Details of the Researcher

PHOTO

Itaru Shimizu
Section
Research Center for Neutrino Science
Job title
Professor
Degree

  • 博士（理学）（東北大学）

  • 修士（理学）（東北大学）

Committee Memberships 3

  • 物理学実験検討委員会(専攻内委員会)　学内委員

    2024/04 - Present

  • ニュートリノ科学研究センター運営委員(部局内委員会)　学内委員

    2015/07 - Present

  • 物理学実験担当者会議委員(専攻内委員会)　学内委員

    2011/04 - 2024/03

Professional Memberships 1

  • 日本物理学会

Research Interests 1

  • ニュートリノ

Research Areas 1

  • Natural sciences / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics /

Papers 58

  1. Combined Pre-supernova Alert System with KamLAND and Super-Kamiokande Peer-reviewed

    S. Abe, M. Eizuka, S. Futagi, A. Gando, Y. Gando, S. Goto, T. Hachiya, K. Hata, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, T. Mitsui, H. Miyake, D. Morita, T. Nakahata, R. Nakajima, K. Nakamura, R. Nakamura, R. Nakamura, J. Nakane, H. Ozaki, K. Saito, T. Sakai, I. Shimizu, J. Shirai, K. Shiraishi, R. Shoji, A. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, K. Watanabe, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, Z. Fu, J. Smolsky, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, S. Dell’Oro, T. O’Donnell, J. A. Detwiler, S. Enomoto, M. P. Decowski, K. M. Weerman, C. Grant, H. Song, A. Li, S. N. Axani, M. Garcia, K. Abe, S. Abe, C. Bronner, Y. Hayato, K. Hiraide, K. Hosokawa, K. Ieki, M. Ikeda, J. Kameda, Y. Kanemura, R. Kaneshima, Y. Kashiwagi, Y. Kataoka, S. Miki, S. Mine, M. Miura, S. Moriyama, M. Nakahata, Y. Nakano, S. Nakayama, Y. Noguchi, K. Sato, H. Sekiya, H. Shiba, K. Shimizu, M. Shiozawa, Y. Sonoda, Y. Suzuki, A. Takeda, Y. Takemoto, H. Tanaka, T. Yano, S. Han, T. Kajita, K. Okumura, T. Tashiro, T. Tomiya, X. Wang, S. Yoshida, P. Fernandez, L. Labarga, N. Ospina, B. Zaldivar, B. W. Pointon, E. Kearns, J. L. Raaf, L. Wan, T. Wester, J. Bian, N. J. Griskevich, M. B. Smy, H. W. Sobel, V. Takhistov, A. Yankelevich, J. Hill, M. C. Jang, S. H. Lee, D. H. Moon, R. G. Park, B. Bodur, K. Scholberg, C. W. Walter, A. Beauchêne, O. Drapier, A. Giampaolo, Th. A. Mueller, A. D. Santos, P. Paganini, B. Quilain, R. Rogly, T. Nakamura, J. S. Jang, L. N. Machado, J. G. Learned, K. Choi, N. Iovine, S. Cao, L. H. V. Anthony, D. Martin, N. W. Prouse, M. Scott, Y. Uchida, V. Berardi, N. F. Calabria, M. G. Catanesi, E. Radicioni, A. Langella, G. De Rosa, G. Collazuol, M. Feltre, F. Iacob, M. Mattiazzi, L. Ludovici, M. Gonin, L. Périssé, G. Pronost, C. Fujisawa, S. Horiuchi, M. Kobayashi, Y. M. Liu, Y. Maekawa, Y. Nishimura, R. Okazaki, R. Akutsu, M. Friend, T. Hasegawa, T. Ishida, T. Kobayashi, M. Jakkapu, T. Matsubara, T. Nakadaira, K. Nakamura, Y. Oyama, K. Sakashita, T. Sekiguchi, T. Tsukamoto, A. Portocarrero Yrey, N. Bhuiyan, G. T. Burton, F. Di Lodovico, J. Gao, A. Goldsack, T. Katori, J. Migenda, R. M. Ramsden, Z. Xie, S. Zsoldos, A. T. Suzuki, Y. Takagi, Y. Takeuchi, H. Zhong, J. Feng, L. Feng, J. R. Hu, Z. Hu, M. Kawaue, T. Kikawa, M. Mori, T. Nakaya, R. A. Wendell, K. Yasutome, S. J. Jenkins, N. McCauley, P. Mehta, A. Tarrant, M. J. Wilking, Y. Fukuda, Y. Itow, H. Menjo, K. Ninomiya, Y. Yoshioka, J. Lagoda, M. Mandal, P. Mijakowski, Y. S. Prabhu, J. Zalipska, M. Jia, J. Jiang, W. Shi, C. Yanagisawa, M. Harada, Y. Hino, H. Ishino, Y. Koshio, F. Nakanishi, S. Sakai, T. Tada, T. Tano, T. Ishizuka, G. Barr, D. Barrow, L. Cook, S. Samani, D. Wark, A. Holin, F. Nova, S. Jung, B. S. Yang, J. Y. Yang, J. Yoo, J. E. P. Fannon, L. Kneale, M. Malek, J. M. McElwee, M. D. Thiesse, L. F. Thompson, S. T. Wilson, H. Okazawa, S. M. Lakshmi, S. B. Kim, E. Kwon, J. W. Seo, I. Yu, A. K. Ichikawa, K. D. Nakamura, S. Tairafune, K. Nishijima, A. Eguchi, K. Nakagiri, Y. Nakajima, S. Shima, N. Taniuchi, E. Watanabe, M. Yokoyama, P. de Perio, S. Fujita, C. Jesús-Valls, K. Martens, K. M. Tsui, M. R. Vagins, J. Xia, S. Izumiyama, M. Kuze, R. Matsumoto, K. Terada, R. Asaka, M. Ishitsuka, H. Ito, Y. Ommura, N. Shigeta, M. Shinoki, K. Yamauchi, T. Yoshida, R. Gaur, V. Gousy-Leblanc, M. Hartz, A. Konaka, X. Li, S. Chen, B. D. Xu, A. Q. Zhang, B. Zhang, M. Posiadala-Zezula, S. B. Boyd, R. Edwards, D. Hadley, M. Nicholson, M. O’Flaherty, B. Richards, A. Ali, B. Jamieson, S. Amanai, Ll. Marti, A. Minamino, R. Shibayama, S. Suzuki

    The Astrophysical Journal　973　(2)　140-140　2024/09/26

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ad5fee 　

    ISSN： 0004-637X

    eISSN： 1538-4357

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    Abstract Preceding a core-collapse supernova (CCSN), various processes produce an increasing amount of neutrinos of all flavors characterized by mounting energies from the interior of massive stars. Among them, the electron antineutrinos are potentially detectable by terrestrial neutrino experiments such as KamLAND and Super-Kamiokande (SK) via inverse beta decay interactions. Once these pre-supernova (pre-SN) neutrinos are observed, an early warning of the upcoming CCSN can be provided. In light of this, KamLAND and SK, both located in the Kamioka mine in Japan, have been monitoring pre-SN neutrinos since 2015 and 2021, respectively. Recently, we performed a joint study between KamLAND and SK on pre-SN neutrino detection. A pre-SN alert system combining the KamLAND detector and the SK detector was developed and put into operation, which can provide a supernova alert to the astrophysics community. Fully leveraging the complementary properties of these two detectors, the combined alert is expected to resolve a pre-SN neutrino signal from a 15 M ⊙ star within 510 pc of the Earth at a significance level corresponding to a false alarm rate of no more than 1 per century. For a Betelgeuse-like model with optimistic parameters, it can provide early warnings up to 12 hr in advance.

  2. Search for charged excited states of dark matter with KamLAND-Zen Peer-reviewed

    S. Abe, M. Eizuka, S. Futagi, A. Gando, Y. Gando, S. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, T. Mitsui, H. Miyake, D. Morita, T. Nakahata, R. Nakajima, K. Nakamura, R. Nakamura, R. Nakamura, J. Nakane, H. Ozaki, T. Sakai, I. Shimizu, J. Shirai, K. Shiraishi, R. Shoji, A. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, K. Watanabe, S. Obara, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, A. Ichikawa, B.E. Berger, B.K. Fujikawa, J.G. Learned, J. Maricic, S.N. Axani, Z. Fu, J. Smolsky, L.A. Winslow, Y. Efremenko, H.J. Karwowski, D.M. Markoff, W. Tornow, S. Dell'Oro, T. O'Donnell, J.A. Detwiler, S. Enomoto, M.P. Decowski, K.M. Weerman, C. Grant, A. Li, H. Song

    Physics Letters B　855　138846-138846　2024/08

    Publisher: Elsevier BV

    DOI： 10.1016/j.physletb.2024.138846 　

    ISSN： 0370-2693

  3. Reduction of radioactive impurities in liquid scintillator by using metal scavengers Peer-reviewed

    Y. Kamei, I. Shimizu, Y. Teraoka, T. Yamamura, K. Shirasaki

    Journal of Instrumentation　18　(08)　P08002-1-11　2023/08/01

    Publisher: IOP Publishing

    DOI： 10.1088/1748-0221/18/08/p08002 　

    eISSN： 1748-0221

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    Abstract Development of radio-purification for the large-volume liquid scintillator detector is a key to enhance search sensitivities in neutrino physics. In this paper, we describe laboratory studies on the radio-purification of the liquid scintillator detector by using the metal scavenger, aiming at the improved search for the neutrinoless double beta decay in KamLAND-Zen. In the purification tests, the 210Pb reduction efficiency was evaluated. Based on the purification performance in small-scale system, we designed a large adsorption column for the metal scavenging applicable to the KamLAND purification system. We produced the column and constructed a purification test bench, and confirmed the 212Pb reduction efficiency, the process speed, the LS contamination and quality changes, and the stability of chemical components in the Xe-LS. We found that the metal scavenging is a practical method for the large-volume LS purification, and will be effective to reduce metallic radioactive elements.

  4. Measurement of cosmic-ray muon spallation products in a xenon-loaded liquid scintillator with KamLAND Peer-reviewed

    S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, Z. Fu, J. Smolsky, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, S. Dell'Oro, T. O'Donnell, J. A. Detwiler, S. Enomoto, M. P. Decowski, K. M. Weerman, C. Grant, A. Li, H. Song

    Physical Review C　107　(5)　054612-1-14　2023/05/22

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevc.107.054612 　

    ISSN： 2469-9985

    eISSN： 2469-9993

  5. First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND Peer-reviewed

    S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, Z. Fu, J. Smolsky, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, A. Li, H. Song, S. Dell’Oro, T. O’Donnell

    Physical Review D　107　(7)　072006-1-17　2023/04/19

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevd.107.072006 　

    ISSN： 2470-0010

    eISSN： 2470-0029

  6. (Review Article) Search for Majorana neutrinos Invited Peer-reviewed

    Itaru Shimizu

    Progress of Theoretical and Experimental Physics　2023　ptad038-1-11　2023/03/15

    Publisher: Oxford University Press (OUP)

    DOI： 10.1093/ptep/ptad038 　

    eISSN： 2050-3911

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    Abstract Whether there exist elementary particles having Majorana nature is a fundamental open question that has persisted since the 1930s. The only practical experiments to test the Majorana nature of neutrinos is the search for neutrinoless double-beta decay, which has been a major challenge for nuclear and particle physicists. In the 2000s, a number of experiments using advanced technologies were planned, some of which have already achieved significant improvements in the search sensitivity. In this article, the current status of the neutrinoless double-beta decay searches is summarized, reviewing the progress of KamLAND-Zen, which recorded the world’s best sensitivity in the effective Majorana neutrino mass limit.

  7. KamNet: An integrated spatiotemporal deep neural network for rare event searches in KamLAND-Zen Peer-reviewed

    A. Li, Z. Fu, C. Grant, H. Ozaki, I. Shimizu, H. Song, A. Takeuchi, L. A. Winslow

    Physical Review C　107　(1)　014323-1-12　2023/01/30

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevc.107.014323 　

    ISSN： 2469-9985

    eISSN： 2469-9993

  8. Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen Peer-reviewed

    S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, S. Hayashida, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, N. Maemura, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, D. Chernyak, A. Kozlov, K. Z. Nakamura, S. Yoshida, Y. Takemoto, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, J. Smolsky, Z. Fu, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, S. Dell’Oro, T. O’Donnell, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, A. Li, H. Song

    Physical Review Letters　130　(5)　051801-1-7　2023/01/30

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevlett.130.051801 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  9. KamLAND’s search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube

    S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, T. Kinoshita, M. Koga, M. Kurasawa, N. Maemura, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, Y. Yoshida, S. Obara, A.K. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B.E. Berger, B.K. Fujikawa, J.G. Learned, J. Maricic, S.N. Axani, J. Smolsky, J. Lertprasertpong, L.A. Winslow, Z. Fu, J. Ouellet, Y. Efremenko, H.J. Karwowski, D.M. Markoff, W. Tornow, A. Li, J.A. Detwiler, S. Enomoto, M.P. Decowski, C. Grant, H. Song, T. O’Donnell, S. Dell’Oro

    Astroparticle Physics　143　102758-102758　2022/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.astropartphys.2022.102758 　

    ISSN： 0927-6505

  10. Abundances of Uranium and Thorium Elements in Earth Estimated by Geoneutrino Spectroscopy

    S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, N. Maemura, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, Y. Shirahata, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, Z. Fu, J. Smolsky, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, H. Song, T. O’Donnell, S. Dell’Oro

    Geophysical Research Letters　49　(16)　2022/08/16

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022gl099566 　

    ISSN： 0094-8276

    eISSN： 1944-8007

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    Abstract The decay of the primordial isotopes 238U, 235U, 232Th, and 40K has contributed to the terrestrial heat budget throughout the Earth's history. Hence, the individual abundance of those isotopes are key parameters in reconstructing contemporary Earth models. The geoneutrinos produced by the radioactive decays of uranium and thorium have been observed with the Kamioka Liquid‐Scintillator Antineutrino Detector (KamLAND). Those measurements have been improved with more than 18‐year observation time, and improvement in detector background levels mainly with an 8‐year nearly reactor‐free period, which now permit spectroscopy with geoneutrinos. Our results yield the first constraint on both uranium and thorium heat contributions. The KamLAND result is consistent with geochemical estimations based on elemental abundances of chondritic meteorites and mantle peridotites. The High‐Q model is disfavored at 99.76% C.L. and a fully radiogenic model is excluded at 5.2σ assuming a homogeneous heat producing element distribution in the mantle.

  11. Search for Supernova Neutrinos and Constraint on the Galactic Star Formation Rate with the KamLAND Data

    S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, N. Maemura, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, Y. Yoshida, S. Obara, A. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, L. A. Winslow, Z. Fu, J. Smolsky, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, H. Song, T. O’Donnell, S. Dell’Oro

    The Astrophysical Journal　934　(1)　85-85　2022/07/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac7a3f 　

    ISSN： 0004-637X

    eISSN： 1538-4357

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    Abstract We present the results of a search for core-collapse supernova neutrinos, using long-term KamLAND data from 2002 March 9 to 2020 April 25. We focus on the electron antineutrinos emitted from supernovae in the energy range of 1.8–111 MeV. Supernovae will make a neutrino event cluster with the duration of ∼10 s in the KamLAND data. We find no neutrino clusters and give the upper limit on the supernova rate to be 0.15 yr−1 with a 90% confidence level. The detectable range, which corresponds to a >95% detection probability, is 40–59 kpc and 65–81 kpc for core-collapse supernovae and failed core-collapse supernovae, respectively. This paper proposes to convert the supernova rate obtained by the neutrino observation to the Galactic star formation rate. Assuming a modified Salpeter-type initial mass function, the upper limit on the Galactic star formation rate is <(17.5–22.7) M⊙ yr−1 with a 90% confidence level.

  12. A Search for Correlated Low-energy Electron Antineutrinos in KamLAND with Gamma-Ray Bursts Peer-reviewed

    S. Abe, S. Asami, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, T. Kinoshita, M. Koga, N. Maemura, T. Mitsui, H. Miyake, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, M. Eizuka, M. Kurasawa, T. Nakahata, S. Futagi, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, J. Smolsky, C. Laber-Smith, L. A. Winslow, Z. Fu, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, H. Song, T. O’Donnell, S. Dell’Oro

    The Astrophysical Journal　927　(1)　69-69　2022/03/07

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac4e7e 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  13. Limits on Astrophysical Antineutrinos with the KamLAND Experiment Peer-reviewed

    S. Abe, S. Asami, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, S. Hayashida, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, T. Kinoshita, M. Koga, N. Maemura, T. Mitsui, H. Miyake, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, Y. Shirahata, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, Y. Wada, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, A. Kozlov, D. Chernyak, Y. Takemoto, S. Yoshida, S. Umehara, K. Fushimi, S. Hirata, K. Z. Nakamura, M. Yoshida, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, L. A. Winslow, Z. Fu, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, T. O’Donnell, S. Dell’Oro

    The Astrophysical Journal　925　(1)　14-14　2022/01/20

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac32c1 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  14. Search for Solar Flare Neutrinos with the KamLAND Detector Peer-reviewed

    S. Abe, S. Asami, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, S. Hayashida, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, T. Kinoshita, M. Koga, N. Maemura, T. Mitsui, H. Miyake, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, Y. Wada, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, A. Kozlov, D. Chernyak, Y. Takemoto, S. Yoshida, S. Umehara, K. Fushimi, K. Z. Nakamura, M. Yoshida, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, L. A. Winslow, Z. Fu, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, T. O’Donnell, S. Dell’Oro

    The Astrophysical Journal　924　(2)　103-103　2022/01/17

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac35d1 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  15. The nylon balloon for xenon loaded liquid scintillator in KamLAND-Zen 800 neutrinoless double-beta decay search experiment Peer-reviewed

    Y. Gando, A. Gando, T. Hachiya, S. Hayashida, K. Hosokawa, H. Ikeda, T. Mitsui, T. Nakada, S. Obara, H. Ozaki, J. Shirai, K. Ueshima, H. Watanabe, S. Abe, K. Hata, A. Hayashi, Y. Honda, S. Ieki, K. Inoue, K. Ishidoshiro, S. Ishikawa, Y. Kamei, K. Kamizawa, Y. Karino, N. Kawada, T. Kinoshita, M. Koga, S. Matsuda, H. Miyake, K. Nakamura, K. Nemoto, A. Ono, N. Ota, S. Otsuka, Y. Shibukawa, I. Shimizu, Y. Shirahata, K. Soma, A. Suzuki, A.A. Suzuki, T. Takai, A. Takeuchi, K. Tamae, Y. Teraoka, Y. Wada, D. Chernyak, A. Kozlov, S. Yoshida, S. Umehara, Y. Takemoto, K. Fushimi, S. Hirata, C. Grant, A. Li, J.G. Learned, J. Maricic, B.E. Berger, B.K. Fujikawa, S. Fraker, A. Herman, E. Krupczak, G.L. Pease, L.A. Winslow, Y. Efremenko, H.J. Karwowski, D.M. Markoff, W. Tornow, T. O'Donnell, S. Dell'Oro, J.A. Detwiler, S. Enomoto, M.P. Decowski

    Journal of Instrumentation　16　(08)　P08023-P08023　2021/08/09

    Publisher: IOP Publishing

    DOI： 10.1088/1748-0221/16/08/p08023 　

    eISSN： 1748-0221

  16. Low-energy astrophysics with KamLAND Peer-reviewed

    Nanami Kawada, Shuhei Obara, Koji Ishidoshiro, Seisho Abe, Sachihiro Asami, Azusa Gando, Yoshihito Gando, Tomomi Gima, Anna Goto, Takahiko Hachiya, Kazumi Hata, Shingo Hayashida, Keishi Hosokawa, Koichi Ichimura, Sei Ieki, Haruo Ikeda, Kunio Inoue, Yuto Kamei, Yasuhiro Kishimoto, Tatsuya Kinoshita, Masayuki Koga, Naoya Maemura, Tadao Mitsui, Haruhiko Miyake, Kengo Nakamura, Kosuke Nakamura, Rikuo Nakamura, Hideyoshi Ozaki, Taichi Sakai, Hiroto Sambonsugi, Itaru Shimizu, Junpei Shirai, Kensuke Shiraishi, Atsuto SUZUKI, Yuya Suzuki, Atsuto Takeuchi, Kyoko Tamae, Kota Ueshima, Yoshiki Wada, Hiroko Watanabe, Yuki Yoshida, Atsuko Ichikawa, Alexandre Kozlov, Dmitry CHERNYAK, Yasuhiro Takemoto, Sei Yoshida, Saori Umehara, Ken-Ichi Fushimi, Kazuhiro Nakamura, Masashi Yoshida, Bruce Edmond Berger, Brian Kurt Fujikawa, John Gregory Learned, Jelena Maricic, Spencer N. Axani, Lindley Anne Winslow, Zhenghao Fu, Jonathan Ouellet, Yuri Efremenko, Hugon J. Karwowski, Dian M. Markoff, Werner Tornow, Aobo Li, Jason A. Detwiler, Sanshiro Enomoto, Patric Decowski, Chistopher Grant, Thomas O'Donnell, Stefano Dell'Oro

    Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)　2021/07/29

    Publisher: Sissa Medialab

    DOI： 10.22323/1.395.1163 　

  17. Precision Analysis of the Xe136 Two-Neutrino ββ Spectrum in KamLAND-Zen and Its Impact on the Quenching of Nuclear Matrix Elements Peer-reviewed

    A. Gando, Y. Gando, T. Hachiya, M. Ha Minh, S. Hayashida, Y. Honda, K. Hosokawa, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, K. Kamizawa, T. Kinoshita, M. Koga, S. Matsuda, T. Mitsui, K. Nakamura, A. Ono, N. Ota, S. Otsuka, H. Ozaki, Y. Shibukawa, I. Shimizu, Y. Shirahata, J. Shirai, T. Sato, K. Soma, A. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, H. Watanabe, D. Chernyak, A. Kozlov, S. Obara, S. Yoshida, Y. Takemoto, S. Umehara, K. Fushimi, S. Hirata, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, T. O’Donnell, J. A. Detwiler, S. Enomoto, M. P. Decowski, J. Menéndez, R. Dvornický, F. Šimkovic

    Physical Review Letters　122　(19)　2019/05/13

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevlett.122.192501 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  18. Double Beta Decay Experiments With Loaded Liquid Scintillator Invited Peer-reviewed

    I. Shimizu, M. Chen

    Frontiers in Physics　7　33　2019/03

  19. A Search for Electron Antineutrinos Associated with Gravitational-wave Events GW150914 and GW151226 Using KamLAND (vol 829, L34, 2016) Peer-reviewed

    A. Gando, Y. Gando, T. Hachiya, A. Hayashi, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Karino, M. Koga, S. Matsuda, T. Mitsui, K. Nakamura, S. Obara, T. Oura, H. Ozaki, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, T. Takai, K. Tamae, Y. Teraoka, K. Ueshima, H. Watanabe, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, A. Piepke, T. I. Banks, B. E. Berger, B. K. Fujikawa, T. O'Donnell, J. G. Learned, J. Maricic, M. Sakai, L. A. Winslow, E. Krupczak, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    ASTROPHYSICAL JOURNAL LETTERS　851　(1)　L34　2017/12

    DOI： 10.3847/2041-8213/aa9a32 　

    ISSN： 2041-8205

    eISSN： 2041-8213

  20. KamLAND: geo-neutrino measurement in Japan Invited Peer-reviewed

    Itaru Shimizu

    ANNALS OF GEOPHYSICS　60　(1)　S0113　2017

    DOI： 10.4401/ag-7388 　

    ISSN： 1593-5213

    eISSN： 2037-416X

  21. A SEARCH FOR ELECTRON ANTINEUTRINOS ASSOCIATED WITH GRAVITATIONAL-WAVE EVENTS GW150914 AND GW151226 USING KAMLAND Peer-reviewed

    A. Gando, Y. Gando, T. Hachiya, A. Hayashi, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Karino, M. Koga, S. Matsuda, T. Mitsui, K. Nakamura, S. Obara, T. Oura, H. Ozaki, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, T. Takai, K. Tamae, Y. Teraoka, K. Ueshima, H. Watanabe, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, A. Piepke, T. I. Banks, B. E. Berger, B. K. Fujikawa, T. O'Donnell, J. G. Learned, J. Maricic, M. Sakai, L. A. Winslow, E. Krupczak, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    ASTROPHYSICAL JOURNAL LETTERS　829　(2)　2016/10

    DOI： 10.3847/2041-8205/829/2/L34 　

    ISSN： 2041-8205

    eISSN： 2041-8213

  22. Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen (vol 117, 082503, 2016) Peer-reviewed

    A. Gando, Y. Gando, T. Hachiya, A. Hayashi, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Karino, M. Koga, S. Matsuda, T. Mitsui, K. Nakamura, S. Obara, T. Oura, H. Ozaki, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, T. Takai, K. Tamae, Y. Teraoka, K. Ueshima, H. Watanabe, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, T. I. Banks, B. E. Berger, B. K. Fujikawa, T. O'Donnell, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    PHYSICAL REVIEW LETTERS　117　(10)　109903　2016/09

    DOI： 10.1103/PhysRevLett.117.109903 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  23. Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen Peer-reviewed

    A. Gando, Y. Gando, T. Hachiya, A. Hayashi, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Karino, M. Koga, S. Matsuda, T. Mitsui, K. Nakamura, S. Obara, T. Oura, H. Ozaki, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, T. Takai, K. Tamae, Y. Teraoka, K. Ueshima, H. Watanabe, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, T. I. Banks, B. E. Berger, B. K. Fujikawa, T. O'Donnell, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    PHYSICAL REVIEW LETTERS　117　(8)　082503　2016/08

    DOI： 10.1103/PhysRevLett.117.082503 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  24. Search for double-beta decay of Xe-136 to excited states of Ba-136 with the KamLAND-Zen experiment Peer-reviewed

    K. Asakura, A. Gando, Y. Gando, T. Hachiya, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, T. Ishikawa, S. Ishio, M. Koga, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, S. Obara, M. Otani, T. Oura, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, H. Tachibana, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, H. Yoshida, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, T. I. Banks, B. E. Berger, B. K. Fujikawa, T. O'Donnell, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    NUCLEAR PHYSICS A　946　171-181　2016/02

    DOI： 10.1016/j.nuclphysa.2015.11.011 　

    ISSN： 0375-9474

    eISSN： 1873-1554

  25. KamLAND SENSITIVITY TO NEUTRINOS FROM PRE-SUPERNOVA STARS Peer-reviewed

    K. Asakura, A. Gando, Y. Gando, T. Hachiya, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, T. Ishikawa, S. Ishio, M. Koga, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, S. Obara, T. Oura, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, H. Tachibana, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, A. Piepke, T. I. Banks, B. E. Berger, B. K. Fujikawa, T. O'Donnell, J. G. Learned, J. Maricic, S. Matsuno, M. Sakai, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    ASTROPHYSICAL JOURNAL　818　(1)　91　2016/02

    DOI： 10.3847/0004-637X/818/1/91 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  26. Be-7 solar neutrino measurement with KamLAND Peer-reviewed

    A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K. Inoue, K. Ishidoshiro, H. Ishikawa, Y. Kishimoto, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui, D. Motoki, K. Nakajima, K. Nakamura, A. Obata, A. Oki, Y. Oki, M. Otani, I. Shimizu, J. Shirai, A. Suzuki, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, S. Yamada, Y. Yamauchi, H. Yoshida, A. Kozlov, Y. Takemoto, S. Yoshida, C. Grant, G. Keefer, D. W. McKee, A. Piepke, T. I. Banks, T. Bloxham, S. J. Freedman, B. K. Fujikawa, K. Han, L. Hsu, K. Ichimura, H. Murayama, T. O'Donnell, H. M. Steiner, L. A. Winslow, D. Dwyer, C. Mauger, R. D. McKeown, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic, T. Miletic, J. G. Learned, M. Sakai, G. A. Horton-Smith, A. Tang, K. E. Downum, K. Tolich, Y. Efremenko, Y. Kamyshkov, O. Perevozchikov, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, K. Heeger, M. P. Decowski

    PHYSICAL REVIEW C　92　(5)　055808　2015/11

    DOI： 10.1103/PhysRevC.92.055808 　

    ISSN： 0556-2813

    eISSN： 1089-490X

  27. Search for the proton decay mode p -> (v)over-barK(+) with KamLAND Peer-reviewed

    K. Asakura, A. Gando, Y. Gando, T. Hachiya, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, T. Ishikawa, S. Ishio, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, S. Obara, Y. Oki, T. Oura, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, H. Tachibana, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, Y. Yamauchi, H. Yoshida, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, C. Grant, A. Piepke, T. I. Banks, B. E. Berger, S. J. Freedman, B. K. Fujikawa, T. O'Donnell, J. G. Learned, J. Maricic, M. Sakai, S. Dazeley, R. Svoboda, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    PHYSICAL REVIEW D　92　(5)　052006　2015/09

    DOI： 10.1103/PhysRevD.92.052006 　

    ISSN： 2470-0010

    eISSN： 2470-0029

  28. STUDY OF ELECTRON ANTI-NEUTRINOS ASSOCIATED WITH GAMMA-RAY BURSTS USING KamLAND Peer-reviewed

    K. Asakura, A. Gando, Y. Gando, T. Hachiya, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, T. Ishikawa, S. Ishio, M. Koga, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, S. Obara, Y. Oki, T. Oura, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, H. Tachibana, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, H. Yoshida, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, A. Piepke, T. I. Banks, B. E. Berger, B. K. Fujikawa, T. O'Donnell, J. G. Learned, J. Maricic, M. Sakai, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    ASTROPHYSICAL JOURNAL　806　(1)　87　2015/06

    DOI： 10.1088/0004-637X/806/1/87 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  29. Physics potential of a long-baseline neutrino oscillation experiment using a J-PARC neutrino beam and Hyper-Kamiokande Peer-reviewed

    K. Abe, H. Aihara, C. Andreopoulos, I. Anghel, A. Ariga, T. Ariga, R. Asfandiyarov, M. Askins, J. J. Back, P. Ballett, M. Barbi, G. J. Barker, G. Barr, F. Bay, P. Beltrame, V. Berardi, M. Bergevin, S. Berkman, T. Berry, S. Bhadra, F. D. M. Blaszczyk, A. Blondel, S. Bolognesi, S. B. Boyd, A. Bravar, C. Bronner, F. S. Cafagna, G. Carminati, S. L. Cartwright, M. G. Catanesi, K. Choi, J. H. Choi, G. Collazuol, G. Cowan, L. Cremonesi, G. Davies, G. De Rosa, C. Densham, J. Detwiler, D. Dewhurst, F. Di Lodovico, S. Di Luise, O. Drapier, S. Emery, A. Ereditato, P. Fernandez, T. Feusels, A. Finch, M. Fitton, M. Friend, Y. Fujii, Y. Fukuda, D. Fukuda, V. Galymov, K. Ganezer, M. Gonin, P. Gumplinger, D. R. Hadley, L. Haegel, A. Haesler, Y. Haga, B. Hartfiel, M. Hartz, Y. Hayato, M. Hierholzer, J. Hill, A. Himmel, S. Hirota, S. Horiuchi, K. Huang, A. K. Ichikawa, T. Iijima, M. Ikeda, J. Imber, K. Inoue, J. Insler, R. A. Intonti, T. Irvine, T. Ishida, H. Ishino, M. Ishitsuka, Y. Itow, A. Izmaylov, B. Jamieson, H. I. Jang, M. Jiang, K. K. Joo, C. K. Jung, A. Kaboth, T. Kajita, J. Kameda, Y. Karadhzov, T. Katori, E. Kearns, M. Khabibullin, A. Khotjantsev, J. Y. Kim, S. B. Kim, Y. Kishimoto, T. Kobayashi, M. Koga, A. Konaka, L. L. Kormos, A. Korzenev, Y. Koshio, W. R. Kropp, Y. Kudenko, T. Kutter, M. Kuze, L. Labarga, J. Lagoda, M. Laveder, M. Lawe, J. G. Learned, I. T. Lim, T. Lindner, A. Longhin, L. Ludovici, W. Ma, L. Magaletti, K. Mahn, M. Malek, C. Mariani, L. Marti, J. F. Martin, C. Martin, P. P. J. Martins, E. Mazzucato, N. McCauley, K. S. McFarland, C. McGrew, M. Mezzetto, H. Minakata, A. Minamino, S. Mine, O. Mineev, M. Miura, J. Monroe, T. Mori, S. Moriyama, T. Mueller, F. Muheim, M. Nakahata, K. Nakamura, T. Nakaya, S. Nakayama, M. Needham, T. Nicholls, M. Nirkko, Y. Nishimura, E. Noah, J. Nowak, H. Nunokawa, H. M. O'Keeffe, Y. Okajima, K. Okumura, S. M. Oser, E. O'Sullivan, T. Ovsiannikova, R. A. Owen, Y. Oyama, J. Perez, M. Y. Pac, V. Palladino, J. L. Palomino, V. Paolone, D. Payne, O. Perevozchikov, J. D. Perkin, C. Pistillo, S. Playfer, M. Posiadala-Zezula, J. -M. Poutissou, B. Quilain, M. Quinto, E. Radicioni, P. N. Ratoff, M. Ravonel, M. A. Rayner, A. Redij, F. Retiere, C. Riccio, E. Richard, E. Rondio, H. J. Rose, M. Ross-Lonergan, C. Rott, S. D. Rountree, A. Rubbia, R. Sacco, M. Sakuda, M. C. Sanchez, E. Scantamburlo, K. Scholberg, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, A. Shaikhiev, I. Shimizu, M. Shiozawa, S. Short, G. Sinnis, M. B. Smy, J. Sobczyk, H. W. Sobel, T. Stewart, J. L. Stone, Y. Suda, Y. Suzuki, A. T. Suzuki, R. Svoboda, R. Tacik, A. Takeda, A. Taketa, Y. Takeuchi, H. A. Tanaka, H. K. M. Tanaka, H. Tanaka, R. Terri, L. F. Thompson, M. Thorpe, S. Tobayama, N. Tolich, T. Tomura, C. Touramanis, T. Tsukamoto, M. Tzanov, Y. Uchida, M. R. Vagins, G. Vasseur, R. B. Vogelaar, C. W. Walter, D. Wark, M. O. Wascko, A. Weber, R. Wendell, R. J. Wilkes, M. J. Wilking, J. R. Wilson, T. Xin, K. Yamamoto, C. Yanagisawa, T. Yano, S. Yen, N. Yershov, M. Yokoyama, M. Zito

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS　(5)　053C02　2015/05

    DOI： 10.1093/ptep/ptv061 　

    ISSN： 2050-3911

  30. Results from KamLAND-Zen

    K. Asakura, A. Gando, Y. Gando, T. Hachiya, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, T. Ishikawa, S. Ishio, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, S. Obara, Y. Oki, M. Otani, T. Oura, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, H. Tachibana, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, Y. Yamauchi, H. Yoshida, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, T. I. Banks, S. J. Freedman, B. K. Fujikawa, T. O'Donnell, L. A. Winslow, B. E. Berger, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    XXVI INTERNATIONAL CONFERENCE ON NEUTRINO PHYSICS AND ASTROPHYSICS (NEUTRINO 2014)　1666　170003　2015

    DOI： 10.1063/14915593 　

    ISSN： 0094-243X

  31. Past and Present Experiments of Geoneutrinos

    Itaru Shimizu

    13TH INTERNATIONAL CONFERENCE ON TOPICS IN ASTROPARTICLE AND UNDERGROUND PHYSICS, TAUP 2013　61　355-358　2015

    DOI： 10.1016/j.phpro.2014.12.075 　

    ISSN： 1875-3892

  32. A compact ultra-clean system for deploying radioactive sources inside the KamLAND detector Peer-reviewed

    T. I. Banks, S. J. Freedman, J. Wallig, N. Ybarrolaza, A. Gando, Y. Gando, H. Ikeda, K. Inoue, Y. Kishimoto, M. Koga, T. Mitsui, K. Nakamura, I. Shimizu, J. Shirai, A. Suzuki, Y. Takemoto, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, H. Yoshida, S. Yoshida, A. Kozlov, C. Grant, G. Keefer, A. Piepke, T. Bloxham, B. K. Fujikawa, K. Han, K. Ichimura, H. Murayama, T. O'Donnell, H. M. Steiner, L. A. Winslow, D. A. Dwyer, R. D. McKeown, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic, T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, M. Sakai, G. A. Horton-Smith, K. E. Downum, G. Gratta, Y. Efremenko, O. Perevozchikov, H. J. Karwowski, D. M. Markoff, W. Tornow, K. M. Heeger, J. A. Detwiler, S. Enomoto, M. P. Decowski

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT　769　(1)　88-96　2015/01

    DOI： 10.1016/j.nima.2014.09.068 　

    ISSN： 0168-9002

    eISSN： 1872-9576

  33. Laboratory studies on the removal of radon-born lead from KamLAND's organic liquid scintillator Peer-reviewed

    G. Keefer, C. Grant, A. Piepke, T. Ebihara, H. Ikeda, Y. Kishimoto, Y. Kibe, Y. Koseki, M. Ogawa, J. Shirai, S. Takeuchi, C. Mauger, C. Zhang, G. Schweitzer, B. E. Berger, S. Dazeley, M. P. Decowski, J. A. Detwiler, Z. Djurcic, D. A. Dwyer, Y. Efremenko, S. Enomoto, S. J. Freedman, B. K. Fujikawa, K. Furuno, A. Gando, Y. Gando, G. Gratta, S. Hatakeyama, K. M. Heeger, L. Hsu, K. Ichimura, K. Inoue, T. Iwamoto, Y. Kamyshkov, H. J. Karwowski, M. Koga, A. Kozlov, C. E. Lane, J. G. Learned, J. Maricic, D. M. Markoff, S. Matsuno, D. McKee, R. D. McKeown, T. Miletic, T. Mitsui, M. Motoki, Kyo Nakajima, Kyohei Nakajima, K. Nakamura, T. O'Donnell, H. Ogawa, F. Piquemal, J. -S. Ricol, I. Shimizu, F. Suekane, A. Suzuki, R. Svoboda, O. Tajima, Y. Takemoto, K. Tamae, K. Tolich, W. Tornow, Hideki Watanabe, Hiroko Watanabe, L. A. Winslow, S. Yoshida

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT　769　(1)　79-87　2015/01

    DOI： 10.1016/j.nima.2014.09.050 　

    ISSN： 0168-9002

    eISSN： 1872-9576

  34. Precision (nu)over-bar(e)-electron scattering measurements with IsoDAR to search for new physics Peer-reviewed

    J. M. Conrad, M. H. Shaevitz, I. Shimizu, J. Spitz, M. Toups, L. Winslow

    PHYSICAL REVIEW D　89　(7)　072010　2014/04

    DOI： 10.1103/PhysRevD.89.072010 　

    ISSN： 1550-7998

    eISSN： 1550-2368

  35. CeLAND: search for a 4th light neutrino state with a 3 PBq 144Ce-144Pr electron antineutrino generator in KamLAND

    A. Gando, Y. Gando, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, H. Ishikawa, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, Y. Oki, M. Otani, I. Shimizu, J. Shirai, F. Suekane, A. Suzuki, Y. Takemoto, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, S. Yamada, Y. Yamauchi, H. Yoshida, M. Cribier, M. Durero, V. Fischer, J. Gaffiot, N. Jonqueres, A. Kouchner, T. Lasserre, D. Leterme, A. Letourneau, D. Lhuillier, G. Mention, G. Rampal, L. Scola, Ch. Veyssiere, M. Vivier, P. Yala, B. E. Berger, A. Kozlov, T. Banks, D. Dwyer, B. K. Fujikawa, K. Han, Yu. G. Kolomensky, Y. Mei, T. O'Donnell, P. Decowski, D. M. Markoff, S. Yoshida, V. N. Kornoukhov, T. V, M. Gelis, G. V. Tikhomirov, J. G. Learned, J. Maricic, S. Matsuno, R. Milincic, H. J. Karwowski, Y. Efremenko, A. Detwiler, S. Enomoto

    2013/12/04

    More details Close

    The reactor neutrino and gallium anomalies can be tested with a 3-4 PBq<br /> (75-100 kCi scale) 144Ce-144Pr antineutrino beta-source deployed at the center<br /> or next to a large low-background liquid scintillator detector. The<br /> antineutrino generator will be produced by the Russian reprocessing plant PA<br /> Mayak as early as 2014, transported to Japan, and deployed in the Kamioka<br /> Liquid Scintillator Anti-Neutrino Detector (KamLAND) as early as 2015.<br /> KamLAND&#039;s 13 m diameter target volume provides a suitable environment to<br /> measure the energy and position dependence of the detected neutrino flux. A<br /> characteristic oscillation pattern would be visible for a baseline of about 10<br /> m or less, providing a very clean signal of neutrino disappearance into a<br /> yet-unknown, sterile neutrino state. This will provide a comprehensive test of<br /> the electron dissaperance neutrino anomalies and could lead to the discovery of<br /> a 4th neutrino state for Delta_m^2 &gt; 0.1 eV^2 and sin^2(2theta) &gt; 0.05.

  36. White paper: CeLAND - Investigation of the reactor antineutrino anomaly with an intense 144Ce-144Pr antineutrino source in KamLAND

    A. Gando, Y. Gando, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, H. Ishikawa, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, Y. Oki, M. Otani, I. Shimizu, J. Shirai, F. Suekane, A. Suzuki, Y. Takemoto, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, S. Yamada, Y. Yamauchi, H. Yoshida, T. Banks, B. E. Berger, M. Cribier, P. Decowski, J. A. Detwiler, M. Durero, D. Dwyer, Y. Efremenko, S. Enomoto, V. Fischer, B. K. Fujikawa, J. Gaffiot, V. M. Gelis, H. J. Karwowski, Yu. G. Kolomensky, A. Kozlov, V. N. Kornoukhov, T. Lasserre, J. G. Learned, A. Letourneau, D. Lhuillier, J. Maricic, D. M. Markoff, S. Matsuno, G. Mention, R. Milincic, T. ODonnell, I. S. Saldikov, L. Scola, G. V. Tikhomirov, Ch. Veyssiere, M. Vivier, S. Yoshida

    2013/09/26

    More details Close

    We propose to test for short baseline neutrino oscillations, implied by the<br /> recent reevaluation of the reactor antineutrino flux and by anomalous results<br /> from the gallium solar neutrino detectors. The test will consist of producing a<br /> 75 kCi 144Ce - 144Pr antineutrino source to be deployed in the Kamioka Liquid<br /> Scintillator Anti-Neutrino Detector (KamLAND). KamLAND&#039;s 13m diameter target<br /> volume provides a suitable environment to measure energy and position<br /> dependence of the detected neutrino flux. A characteristic oscillation pattern<br /> would be visible for a baseline of about 10 m or less, providing a very clean<br /> signal of neutrino disappearance into a yet-unknown, &quot;sterile&quot; state. Such a<br /> measurement will be free of any reactor-related uncertainties. After 1.5 years<br /> of data taking the Reactor Antineutrino Anomaly parameter space will be tested<br /> at &gt; 95% C.L.

  37. Reactor on-off antineutrino measurement with KamLAND Peer-reviewed

    A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K. Inoue, K. Ishidoshiro, H. Ishikawa, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, A. Obata, A. Oki, Y. Oki, M. Otani, I. Shimizu, J. Shirai, A. Suzuki, Y. Takemoto, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, S. Yamada, Y. Yamauchi, H. Yoshida, A. Kozlov, S. Yoshida, A. Piepke, T. I. Banks, B. K. Fujikawa, K. Han, T. O'Donnell, B. E. Berger, J. G. Learned, S. Matsuno, M. Sakai, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    Physical Review D - Particles, Fields, Gravitation and Cosmology　88　(3)　033001　2013/08/02

    DOI： 10.1103/PhysRevD.88.033001 　

    ISSN： 1550-7998 1550-2368

  38. Limit on neutrinoless ββ decay of Xe136 from the first phase of KamLAND-Zen and comparison with the positive claim in Ge76 Peer-reviewed

    A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K. Inoue, K. Ishidoshiro, R. Kato, M. Koga, S. Matsuda, T. Mitsui, D. Motoki, T. Nakada, K. Nakamura, A. Obata, A. Oki, Y. Ono, M. Otani, I. Shimizu, J. Shirai, A. Suzuki, Y. Takemoto, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, S. Yamada, H. Yoshida, A. Kozlov, S. Yoshida, T. I. Banks, S. J. Freedman, B. K. Fujikawa, K. Han, T. O'Donnell, B. E. Berger, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    Physical Review Letters　110　(6)　062502　2013/02/07

    DOI： 10.1103/PhysRevLett.110.062502 　

    ISSN： 0031-9007 1079-7114

  39. Proposal for an Electron Antineutrino Disappearance Search Using High-Rate Li-8 Production and Decay Peer-reviewed

    A. Bungau, A. Adelmann, J. R. Alonso, W. Barletta, R. Barlow, L. Bartoszek, L. Calabretta, A. Calanna, D. Campo, J. M. Conrad, Z. Djurcic, Y. Kamyshkov, M. H. Shaevitz, I. Shimizu, T. Smidt, J. Spitz, M. Wascko, L. A. Winslow, J. J. Yang

    PHYSICAL REVIEW LETTERS　109　(14)　141802　2012/10

    DOI： 10.1103/PhysRevLett.109.141802 　

    ISSN： 0031-9007

  40. Limits on Majoron-emitting double-beta decays of Xe-136 in the KamLAND-Zen experiment Peer-reviewed

    A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K. Inoue, R. Kato, M. Koga, S. Matsuda, T. Mitsui, T. Nakada, K. Nakamura, A. Obata, A. Oki, Y. Ono, I. Shimizu, J. Shirai, A. Suzuki, Y. Takemoto, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, S. Yamada, H. Yoshida, A. Kozlov, S. Yoshida, T. I. Banks, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, K. Han, T. O'Donnell, B. E. Berger, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, S. Enomoto, M. P. Decowski

    PHYSICAL REVIEW C　86　(2)　021601　2012/08

    DOI： 10.1103/PhysRevC.86.021601 　

    ISSN： 0556-2813

  41. Measurement of the double-beta decay half-life of Xe-136 with the KamLAND-Zen experiment Peer-reviewed

    A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K. Inoue, R. Kato, M. Koga, S. Matsuda, T. Mitsui, T. Nakada, K. Nakamura, A. Obata, A. Oki, Y. Ono, I. Shimizu, J. Shirai, A. Suzuki, Y. Takemoto, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, S. Yamada, H. Yoshida, A. Kozlov, S. Yoshida, T. I. Banks, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, K. Han, T. O'Donnell, B. E. Berger, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, S. Enomoto, M. P. Decowski

    PHYSICAL REVIEW C　85　(4)　045504　2012/04

    DOI： 10.1103/PhysRevC.85.045504 　

    ISSN： 0556-2813

  42. SEARCH FOR EXTRATERRESTRIAL ANTINEUTRINO SOURCES WITH THE KamLAND DETECTOR Peer-reviewed

    A. Gando, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, T. Morikawa, N. Nagai, K. Nakajima, K. Nakamura, K. Narita, I. Shimizu, Y. Shimizu, J. Shirai, F. Suekane, A. Suzuki, H. Takahashi, N. Takahashi, Y. Takemoto, K. Tamae, H. Watanabe, B. D. Xu, H. Yabumoto, H. Yoshida, S. Yoshida, S. Enomoto, A. Kozlov, H. Murayama, C. Grant, G. Keefer, A. Piepke, T. I. Banks, T. Bloxham, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, K. Han, R. Kadel, T. O'Donnell, H. M. Steiner, D. A. Dwyer, R. D. McKeown, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic, T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, M. Sakai, G. A. Horton-Smith, K. E. Downum, G. Gratta, Y. Efremenko, Y. Kamyshkov, O. Perevozchikov, H. J. Karwowski, D. M. Markoff, W. Tornow, K. M. Heeger, M. P. Decowski

    ASTROPHYSICAL JOURNAL　745　(2)　193　2012/02

    DOI： 10.1088/0004-637X/745/2/193 　

    ISSN： 0004-637X

  43. Measurement of the B-8 solar neutrino flux with the KamLAND liquid scintillator detector Peer-reviewed

    S. Abe, K. Furuno, A. Gando, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe, W. Kimura, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, T. Morikawa, N. Nagai, K. Nakajima, K. Nakamura, M. Nakamura, K. Narita, I. Shimizu, Y. Shimizu, J. Shirai, F. Suekane, A. Suzuki, H. Takahashi, N. Takahashi, Y. Takemoto, K. Tamae, H. Watanabe, B. D. Xu, H. Yabumoto, E. Yonezawa, H. Yoshida, S. Yoshida, S. Enomoto, A. Kozlov, H. Murayama, C. Grant, G. Keefer, D. McKee, A. Piepke, T. I. Banks, T. Bloxham, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, K. Han, R. Kadel, T. O&apos;Donnell, H. M. Steiner, L. A. Winslow, D. A. Dwyer, C. Mauger, R. D. McKeown, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic, T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, S. Pakvasa, M. Sakai, G. A. Horton-Smith, A. Tang, K. E. Downum, G. Gratta, K. Tolich, Y. Efremenko, Y. Kamyshkov, O. Perevozchikov, H. J. Karwowski, D. M. Markoff, W. Tornow, K. M. Heeger, F. Piquemal, J-S. Ricol, M. P. Decowski

    PHYSICAL REVIEW C　84　(3)　035804　2011/09

    DOI： 10.1103/PhysRevC.84.035804 　

    ISSN： 0556-2813

  44. Partial radiogenic heat model for Earth revealed by geoneutrino measurements Peer-reviewed

    A. Gando, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, T. Morikawa, N. Nagai, K. Nakajima, K. Nakamura, K. Narita, I. Shimizu, Y. Shimizu, J. Shirai, F. Suekane, A. Suzuki, H. Takahashi, N. Takahashi, Y. Takemoto, K. Tamae, H. Watanabe, B. D. Xu, H. Yabumoto, H. Yoshida, S. Yoshida, S. Enomoto, A. Kozlov, H. Murayama, C. Grant, G. Keefer, A. Piepke, T. I. Banks, T. Bloxham, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, K. Han, R. Kadel, T. O'Donnell, H. M. Steiner, D. A. Dwyer, R. D. McKeown, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic, T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, M. Sakai, G. A. Horton-Smith, K. E. Downum, G. Gratta, K. Tolich, Y. Efremenko, O. Perevozchikov, H. J. Karwowski, D. M. Markoff, W. Tornow, K. M. Heeger, M. P. Decowski

    NATURE GEOSCIENCE　4　(9)　647-651　2011/09

    DOI： 10.1038/ngeo1205 　

    ISSN： 1752-0894

  45. Constraints on theta(13) from a three-flavor oscillation analysis of reactor antineutrinos at KamLAND Peer-reviewed

    A. Gando, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, T. Morikawa, N. Nagai, K. Nakajima, K. Nakamura, K. Narita, I. Shimizu, Y. Shimizu, J. Shirai, F. Suekane, A. Suzuki, H. Takahashi, N. Takahashi, Y. Takemoto, K. Tamae, H. Watanabe, B. D. Xu, H. Yabumoto, H. Yoshida, S. Yoshida, S. Enomoto, A. Kozlov, H. Murayama, C. Grant, G. Keefer, A. Piepke, T. I. Banks, T. Bloxham, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, K. Han, R. Kadel, T. O'Donnell, H. M. Steiner, D. A. Dwyer, R. D. McKeown, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic, T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, M. Sakai, G. A. Horton-Smith, K. E. Downum, G. Gratta, Y. Efremenko, O. Perevozchikov, H. J. Karwowski, D. M. Markoff, W. Tornow, K. M. Heeger, M. P. Decowski

    PHYSICAL REVIEW D　83　(5)　052002　2011/03

    DOI： 10.1103/PhysRevD.83.052002 　

    ISSN： 1550-7998

  46. Production of radioactive isotopes through cosmic muon spallation in KamLAND Peer-reviewed

    S. Abe, S. Enomoto, K. Furuno, Y. Gando, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, K. Nakajima, K. Nakajima, K. Nakamura, M. Nakamura, I. Shimizu, Y. Shimizu, J. Shirai, F. Suekane, A. Suzuki, Y. Takemoto, K. Tamae, A. Terashima, H. Watanabe, E. Yonezawa, S. Yoshida, A. Kozlov, H. Murayama, J. Busenitz, T. Classen, C. Grant, G. Keefer, D. S. Leonard, D. McKee, A. Piepke, T. I. Banks, T. Bloxham, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, F. Gray, E. Guardincerri, L. Hsu, K. Ichimura, R. Kadel, C. Lendvai, K. -B. Luk, T. O'Donnell, H. M. Steiner, L. A. Winslow, D. A. Dwyer, C. Jillings, C. Mauger, R. D. McKeown, P. Vogel, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic, T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, S. Pakvasa, J. Foster, G. A. Horton-Smith, A. Tang, S. Dazeley, K. E. Downum, G. Gratta, K. Tolich, W. Bugg, Y. Efremenko, Y. Kamyshkov, O. Perevozchikov, H. J. Karwowski, D. M. Markoff, W. Tornow, K. M. Heeger, F. Piquemal, J. -S. Ricol, M. P. Decowski

    PHYSICAL REVIEW C　81　(2)　025807　2010/02

    DOI： 10.1103/PhysRevC.81.025807 　

    ISSN： 2469-9985

    eISSN： 2469-9993

  47. The KamLAND full-volume calibration system Peer-reviewed

    B. E. Berger, J. Busenitz, T. Classen, M. P. Decowski, D. A. Dwyer, G. Elor, A. Frank, S. J. Freedman, B. K. Fujikawa, M. Galloway, F. Gray, K. M. Heeger, L. Hsu, K. Ichimura, R. Kadel, G. Keefer, C. Lendvai, D. McKee, T. O&apos;Donnell, A. Piepke, H. M. Steiner, D. Syversrud, J. Wallig, L. A. Winslow, T. Ebihara, S. Enomoto, K. Furuno, Y. Gando, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, K. Nakajima, K. Nakajima, K. Nakamura, K. Owada, I. Shimizu, Y. Shimizu, J. Shirai, F. Suekane, A. Suzuki, K. Tamae, S. Yoshida, A. Kozlov, H. Murayama, C. Grant, D. S. Leonard, K-B. Luk, C. Jillings, C. Mauger, R. D. McKeown, C. Zhang, C. E. Lane, J. Maricic, T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, S. Pakvasa, J. Foster, G. A. Horton-Smith, A. Tang, S. Dazeley, K. E. Downum, G. Gratta, K. Tolich, W. Bugg, Y. Efremenko, Y. Kamyshkov, O. Perevozchikov, H. J. Karwowski, D. M. Markoff, W. Tornow, F. Piquemal, J-S. Ricol

    JOURNAL OF INSTRUMENTATION　4　P04017　2009/04

    DOI： 10.1088/1748-0221/4/04/P04017 　

    ISSN： 1748-0221

  48. KamLAND Results Invited

    I. Shimizu

    NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS　188　84-89　2009/03

    DOI： 10.1016/j.nuclphysbps.2009.02.020 　

    ISSN： 0920-5632

  49. Erratum: Precision measurement of neutrino oscillation parameters with KamLAND (Physical Review Letters (2008) 100 (221803))

    S. Abe, T. Ebihara, S. Enomoto, K. Furuno, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Shimizu, A. Kozlov, Y. Minekawa, T. Mitsui, K. Nakajima, K. Nakajima, K. Nakamura, M. Nakamura, K. Owada, I. Shimizu, J. Shirai, F. Suekane, A. Suzuki, Y. Takemoto, K. Tamae, A. Terashima, H. Watanabe, E. Yonezawa, S. Yoshida, J. Busenitz, T. Classen, C. Grant, G. Keefer, D. S. Leonard, D. McKee, A. Piepke, M. P. Decowski, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, F. Gray, E. Guardincerri, L. Hsu, R. Kadel, C. Lendvai, K. B. Luk, H. Murayama, T. O'Donnell, H. M. Steiner, L. A. Winslow, D. A. Dwyer, C. Jillings, C. Mauger, R. D. McKeown, P. Vogel, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic, T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, S. Pakvasa, J. Foster, G. A. Horton-Smith, A. Tang, S. Dazeley, K. E. Downum, G. Gratta, K. Tolich, W. Bugg, Y. Efremenko, Y. Kamyshkov, O. Perevozchikov, H. J. Karwowski, D. M. Markoff, W. Tornow, K. M. Heeger, F. Piquemal, J. S. Ricol

    Physical Review Letters　101　2008/09/12

    DOI： 10.1103/PhysRevLett.101.119904 　

    ISSN： 0031-9007

  50. Precision measurement of neutrino oscillation parameters with KamLAND Peer-reviewed

    S. Abe, T. Ebihara, S. Enomoto, K. Furuno, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, A. Kozlov, Y. Minekawa, T. Mitsui, K. Nakajima, K. Nakajima, K. Nakamura, M. Nakamura, K. Owada, I. Shimizu, Y. Shimizu, J. Shirai, F. Suekane, A. Suzuki, Y. Takemoto, K. Tamae, A. Terashima, H. Watanabe, E. Yonezawa, S. Yoshida, J. Busenitz, T. Classen, C. Grant, G. Keefer, D. S. Leonard, D. McKee, A. Piepke, M. P. Decowski, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, F. Gray, E. Guardincerri, L. Hsu, R. Kadel, C. Lendvai, K. -B. Luk, H. Murayama, T. O&apos;Donnell, H. M. Steiner, L. A. Winslow, D. A. Dwyer, C. Jillings, C. Mauger, R. D. McKeown, P. Vogel, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic, T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, S. Pakvasa, J. Foster, G. A. Horton-Smith, A. Tang, S. Dazeley, K. E. Downum, G. Gratta, K. Tolich, W. Bugg, Y. Efremenko, Y. Kamyshkov, O. Perevozchikov, H. J. Karwowski, D. M. Markoff, W. Tornow, K. M. Heeger, F. Piquemal, J. -S. Ricol

    PHYSICAL REVIEW LETTERS　100　(22)　221803　2008/06

    DOI： 10.1103/PhysRevLett.100.221803 　

    ISSN： 0031-9007

  51. KamLAND (Anti-Neutrino Status) Invited

    Itaru Shimizu

    TAUP2007: TENTH INTERNATIONAL CONFERENCE ON TOPICS IN ASTROPARTICLE AND UNDERGROUND PHYSICS　120　052022　2008

    DOI： 10.1088/1742-6596/120/5/052022 　

    ISSN： 1742-6588

  52. Directional measurement of anti-neutrinos Invited

    I. Shimizu

    NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS　168　147-149　2007/06

    DOI： 10.1016/j.nuclphysbps.2007.02.071 　

    ISSN： 0920-5632

  53. Search for the invisible decay of neutrons with KamLAND Peer-reviewed

    T Araki, S Enomoto, K Furuno, Y Gando, K Ichimura, H Ikeda, K Inoue, Y Kishimoto, M Koga, Y Koseki, T Maeda, T Mitsui, M Motoki, K Nakajima, K Nakamura, H Ogawa, M Ogawa, K Owada, JS Ricol, Shimizu, I, J Shirai, F Suekane, A Suzuki, K Tada, S Takeuchi, K Tamae, Y Tsuda, H Watanabe, J Busenitz, T Classen, Z Djurcic, G Keefer, DS Leonard, A Piepke, E Yakushev, BE Berger, YD Chan, MP Decowski, DA Dwyer, SJ Freedman, BK Fujikawa, J Goldman, F Gray, KM Heeger, L Hsu, KT Lesko, KB Luk, H Murayama, T O'Donnell, AWP Poon, HM Steiner, LA Winslow, C Jillings, C Mauger, RD McKeown, P Vogel, C Zhang, CE Lane, T Miletic, G Guillian, JG Learned, J Maricic, S Matsuno, S Pakvasa, GA Horton-Smith, S Dazeley, S Hatakeyama, A Rojas, R Svoboda, BD Dieterle, J Detwiler, G Gratta, K Ishii, N Tolich, Y Uchida, M Batygov, W Bugg, Y Efremenko, Y Kamyshkov, A Kozlov, Y Nakamura, HJ Karwowski, DM Markoff, RM Rohm, W Tornow, R Wendell, MJ Chen, YF Wang, F Piquemal

    PHYSICAL REVIEW LETTERS　96　(10)　101802　2006/03

    DOI： 10.1103/PhysRevLett.96.101802 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  54. Experimental investigation of geologically produced antineutrinos with KamLAND Peer-reviewed

    T Araki, S Enomoto, K Furuno, Y Gando, K Ichimura, H Ikeda, K Inoue, Y Kishimoto, M Koga, Y Koseki, T Maeda, T Mitsui, M Motoki, K Nakajima, H Ogawa, M Ogawa, K Owada, JS Ricol, Shimizu, I, J Shirai, F Suekane, A Suzuki, K Tada, S Takeuchi, K Tamae, Y Tsuda, H Watanabe, J Busenitz, T Classen, Z Djurcic, G Keefer, D Leonard, A Piepke, E Yakushev, BE Berger, YD Chan, MP Decowski, DA Dwyer, SJ Freedman, BK Fujikawa, J Goldman, F Gray, KM Heeger, L Hsu, KT Lesko, KB Luk, H Murayama, T O'Donnell, AWP Poon, HM Steiner, LA Winslow, C Mauger, RD McKeown, P Vogel, CE Lane, T Miletic, G Guillian, JG Learned, J Maricic, S Matsuno, S Pakvasa, GA Horton-Smith, S Dazeley, S Hatakeyama, A Rojas, R Svoboda, BD Dieterle, J Detwiler, G Gratta, K Ishii, N Tolich, Y Uchida, M Batygov, W Bugg, Y Efremenko, Y Kamyshkov, A Kozlov, Y Nakamura, HJ Karwowski, DM Markoff, K Nakamura, RM Rohm, W Tornow, R Wendell, MJ Chen, YF Wang, F Piquemal

    NATURE　436　(7050)　499-503　2005/07

    DOI： 10.1038/nature03980 　

    ISSN： 0028-0836

  55. Measurement of neutrino oscillation with KamLAND: Evidence of spectral distortion Peer-reviewed

    T Araki, K Eguchi, S Enomoto, K Furuno, K Ichimura, H Ikeda, K Inoue, K Ishihara, T Iwamoto, T Kawashima, Y Kishimoto, M Koga, Y Koseki, T Maeda, T Mitsui, M Motoki, K Nakajima, H Ogawa, K Owada, JS Ricol, Shimizu, I, J Shirai, F Suekane, A Suzuki, K Tada, O Tajima, K Tamae, Y Tsuda, H Watanabe, J Busenitz, T Classen, Z Djurcic, G Keefer, K McKinny, DM Mei, A Piepke, E Yakushev, BE Berger, YD Chan, MP Decowski, DA Dwyer, SJ Freedman, Y Fu, BK Fujikawa, J Goldman, F Gray, KM Heeger, KT Lesko, KB Luk, H Murayama, AWP Poon, HM Steiner, LA Winslow, GA Horton-Smith, C Mauger, RD McKeown, P Vogel, CE Lane, T Miletic, PW Gorham, G Guillian, JG Learned, J Maricic, S Matsuno, S Pakvasa, S Dazeley, S Hatakeyama, A Rojas, R Svoboda, BD Dieterle, J Detwiler, G Gratta, K Ishii, N Tolich, Y Uchida, M Batygov, W Bugg, Y Efremenko, Y Kamyshkov, A Kozlov, Y Nakamura, CR Gould, HJ Karwowski, DM Markoff, JA Messimore, K Nakamura, RM Rohm, W Tornow, R Wendell, AR Young, MJ Chen, YF Wang, F Piquemal

    PHYSICAL REVIEW LETTERS　94　(8)　081801　2005/03

    DOI： 10.1103/PhysRevLett.94.081801 　

    ISSN： 0031-9007

  56. Latest status of KamLAND oscillation analysis and future prospect Invited

    Shimizu, I

    ICHEP 2005: Proceedings of the 32nd International Conference High Energy Physics Vols 1 and 2　1　267-270　2005

  57. High sensitivity search for (nu)over-bar(e)'s from the Sun and other sources at KamLAND Peer-reviewed

    K Eguchi, S Enomoto, K Furuno, H Ikeda, K Ikeda, K Inoue, K Ishihara, T Iwamoto, T Kawashima, Y Kishimoto, M Koga, Y Koseki, T Maeda, T Mitsui, M Motoki, K Nakajima, H Ogawa, K Owada, F Piquemal, Shimizu, I, J Shirai, F Suekane, A Suzuki, K Tada, O Tajima, T Takayama, K Tamae, H Watanabe, J Busenitz, Z Djurcic, K McKinny, DM Mei, A Piepke, E Yakushev, BE Berger, YD Chan, MP Decowski, DA Dwyer, SJ Freedman, Y Fu, BK Fujikawa, J Goldman, KM Heeger, KT Lesko, KB Luk, H Murayama, DR Nygren, CE Okada, AWP Poon, HM Steiner, LA Winslow, GA Horton-Smith, C Mauger, RD McKeown, B Tipton, P Vogel, CE Lane, T Miletic, PW Gorham, G Guillian, JG Learned, J Maricic, S Matsuno, S Pakvasa, S Dazeley, S Hatakeyama, R Svoboda, BD Dieterle, M DiMauro, J Detwiler, G Gratta, K Ishii, N Tolich, Y Uchida, M Batygov, W Bugg, Y Efremenko, Y Kamyshkov, A Kozlov, Y Nakamura, CR Gould, HJ Karwowski, DM Markoff, JA Messimore, K Nakamura, RM Rohm, W Tornow, AR Young, MJ Chen, YF Wang

    PHYSICAL REVIEW LETTERS　92　(7)　071301　2004/02

    DOI： 10.1103/PhysRevLett.92.071301 　

    ISSN： 0031-9007

  58. First results from KamLAND: Evidence for reactor antineutrino disappearance Peer-reviewed

    K Eguchi, S Enomoto, K Furuno, J Goldman, H Hanada, H Ikeda, K Ikeda, K Inoue, K Ishihara, W Itoh, T Iwamoto, T Kawaguchi, T Kawashima, H Kinoshita, Y Kishimoto, M Koga, Y Koseki, T Maeda, T Mitsui, M Motoki, K Nakajima, M Nakajima, T Nakajima, H Ogawa, K Owada, T Sakabe, Shimizu, I, J Shirai, F Suekane, A Suzuki, K Tada, O Tajima, T Takayama, K Tamae, H Watanabe, J Busenitz, Z Djurcic, K McKinny, DM Mei, A Piepke, E Yakushev, BE Berger, YD Chan, MP Decowski, DA Dwyer, SJ Freedman, Y Fu, BK Fujikawa, KM Heeger, KT Lesko, KB Luk, H Murayama, DR Nygren, CE Okada, AWP Poon, HM Steiner, LA Winslow, GA Horton-Smith, RD McKeown, J Ritter, B Tipton, P Vogel, CE Lane, T Miletic, PW Gorham, G Guillian, JG Learned, J Maricic, S Matsuno, S Pakvasa, S Dazeley, S Hatakeyama, M Murakami, RC Svoboda, BD Dieterle, M DiMauro, J Detwiler, G Gratta, K Ishii, N Tolich, Y Uchida, M Batygov, W Bugg, H Cohn, Y Efremenko, Y Kamyshkov, A Kozlov, Y Nakamura, LD Braeckeleer, CR Gould, HJ Karwowski, DM Markoff, JA Messimore, K Nakamura, RM Rohm, W Tornow, AR Young, YF Wang

    PHYSICAL REVIEW LETTERS　90　(2)　021802　2003/01

    DOI： 10.1103/PhysRevLett.90.021802 　

    ISSN： 0031-9007

    eISSN： 1079-7114

Show all ︎Show first 5

Misc. 5

  1. Physics in Hyper-Kamiokande Invited

    Itaru Shimizu

    High Energy News　37　(4)　183-190　2019/03

  2. Search for the proton decay mode p → ν ¯ K+ with KamLAND SEARCH for the PROTON DECAY MODE ⋯ K. ASAKURA et al

    K. Asakura, A. Gando, Y. Gando, T. Hachiya, S. Hayashida, H. Ikeda, K. Inoue, K. Inoue, K. Ishidoshiro, T. Ishikawa, S. Ishio, M. Koga, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, K. Nakamura, S. Obara, Y. Oki, T. Oura, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, H. Tachibana, K. Tamae, K. Ueshima, H. Watanabe, B. D. Xu, Y. Yamauchi, H. Yoshida, A. Kozlov, Y. Takemoto, S. Yoshida, K. Fushimi, C. Grant, A. Piepke, A. Piepke, T. I. Banks, B. E. Berger, B. E. Berger, S. J. Freedman, B. K. Fujikawa, B. K. Fujikawa, T. O'Donnell, T. O'Donnell, J. G. Learned, J. Maricic, M. Sakai, S. Dazeley, R. Svoboda, L. A. Winslow, Y. Efremenko, Y. Efremenko, H. J. Karwowski, H. J. Karwowski, H. J. Karwowski, H. J. Karwowski, D. M. Markoff, W. Tornow, W. Tornow, J. A. Detwiler, S. Enomoto, S. Enomoto, M. P. Decowski, M. P. Decowski

    Physical Review D - Particles, Fields, Gravitation and Cosmology　92　2015/09/23

    DOI： 10.1103/PhysRevD.92.052006 　

    ISSN： 1550-7998

  3. KamLANDにおけるステライルニュートリノ探索実験

    Itaru Shimizu

    High Energy News　32　(4)　223-232　2014/03

  4. Precise Measurement of Neutrino Oscillation Parameters with Reactor Neutrinos in KamLAND

    Itaru Shimizu, Kunio Inoue

    日本物理学会誌　63　(8)　625-628　2008/08

  5. KamLAND実験の最近の結果と展望

    清水 格, 井上 邦雄

    日本物理学会誌　60　(10)　783-790　2005/10/05

    Publisher: 日本物理学会

    DOI： 10.11316/butsuri1946.60.783 　

    ISSN： 0029-0181

    More details Close

    Solar neutrino observations utilizing tiny cross section of neutrinos have revealed the long-standing "solar neutrino problem." The problem was a breakthrough in measurement of neutrino properties and in new theories beyond the standard particle theory. It has contributed to an evolution of particle physics. The resolution of the problem has been obtained by solar neutrino experiments and the KamLAND reactor neutrino experiment. KamLAND has obtained a clear signature of oscillatory neutrino behavior and, as a result, it has determined a neutrino oscillation parameter related to neutrino mass very precisely. Now the accumulated knowledge on neutrino propagation opens new research area by using neutrinos as a prove of interior of the earth and the sun.

Presentations 69

  1. Results from KamLAND-Zen Invited

    Itaru Shimizu

    XXXI Conference on Neutrino Physics and Astrophysics (Neutrino2024), Milano, ITARY　2024/06/18

  2. マヨラナニュートリノの探索

    清水 格

    東京大学物理学教室コロキウム　2023/12/15

  3. Results and Prospects of KamLAND-Zen Invited

    Itaru Shimizu

    The 2023 Fall Meeting of the Division of Nuclear Physics of the American Physical Society and Physical Society of Japan Neutrinoless Double-Beta Decay Workshop, Hawaii, USA　2023/12/01

  4. Double Beta Invited

    清水 格

    高エネルギー将来計画検討委員会Non-Collider班　2023/07/07

  5. KamLAND-Zen Experiment Invited

    Itaru Shimizu

    International Conference on the Physics of the Two Infinities, Kyoto, JAPAN　2023/03/29

  6. 二重ベータ崩壊実験による マヨラナニュートリノの探索 Invited

    清水 格

    神戸大学物理学専攻談話会　2022/12/08

  7. 地下からのニュートリノ観測 Invited

    清水 格

    日本天文学会　2022/09/13

  8. メタルスカベンジャーを用いた液体シンチレータの低放射能化 Invited

    清水 格

    第１１回アルファ放射体実験室利用研究会　2019/10/04

  9. Supernova Detection in Hyper-Kamiokande and Future Prospect International-presentation Invited

    Itaru Shimizu

    Deciphering multi-Dimensional nature of core-collapse SuperNovae via Gravitational-Wave and neutrino signatures (SNeGWv2018)　2018/10/08

  10. Astrophysical Neutrinos at Hyper-Kamiokande International-presentation

    Itaru Shimizu

    39th International Conference on High Energy Physics (ICHEP2018)　2018/07/05

  11. Status of the KamLAND-Zen Experiment International-presentation Invited

    Itaru Shimizu

    6th Symposium on Neutrinos and Dark Matter in Nuclear Physics 2018 (NDM 2018)　2018/06/30

  12. Workshop for Unification and Development of the Neutrino Science Frontier (2017)

    Workshop for Unification and Development of the Neutrino Science Frontier (2017)　2017/12/11

  13. ニュートリノ実験のための低放射能化技術

    ワークショップ 「アクチノイド元素の科学と技術」・第９回アルファ放射体実験室利用研究会　2017/11/27

  14. Status of the Hyper-K Experiment International-presentation

    International Workshop on Next generation Nucleon Decay and Neutrino Detectors (NNN17)　2017/10/26

  15. Astroparticle Physics International-presentation

    Hyper-Kamiokande Advisory Committee Meeting　2017/09/10

  16. 公募研究：メタルスカベンジャーによる液体シンチレータ検出器の極低放射能化

    新学術”宇宙の歴史をひもとく地下素粒子原子核研究”領域研究会　2017/05/21

  17. 公募研究:メタルスカベンジャーによる極低放射能化技術の開発

    新学術”宇宙の歴史をひもとく地下素粒子原子核研究” 極低放射能研究会　2017/02/19

  18. メタルスカベンジャーを用いた液体シンチレータの低放射能化

    第８回アルファ放射体実験室利用研究会　2016/10/28

  19. Broad Overview of Neutrino Physics International-presentation

    International Workshop：Neutrino Research and Thermal Evolution of the Earth　2016/10/25

  20. Double Beta Decay International-presentation

    PhyStat-ν Workshop　2016/05/30

  21. KamLAND and KamLAND-Zen International-presentation

    Frontiers of liquid Scintillator Technology (FroST16)　2016/03/18

  22. メタルスカベンジャーを用いた液体シンチレータの低放射能化

    第７回アルファ放射体実験室利用研究会　2016/02/26

  23. KamLAND : 液体シンチレータ検出器によるSRN探索

    新学術「地下素核研究」第２回超新星ニュートリノ研究会　2016/01/06

  24. 物質粒子生成とマヨラナニュートリノ

    新学術３領域（重力波天体・地下素核研究・中性子星核物質）合同シンポジウム　2015/07/24

  25. 中性子検出について

    新学術「地下素核研究」 第3回B02班若手ミニ研究会　2015/05/17

  26. 公募研究：メタルスカベンジャー による極低放射能化技術の開発

    新学術「地下素核研究」領域研究会　2015/05/15

  27. Neutrino Mass Measurements Asia International-presentation

    Second International Meeting for Large Neutrino Infrastructures　2015/04/20

  28. マヨラナニュートリノ -ダブルβ崩壊探索-

    日本物理学会第70回年次大会　2015/03/21

  29. KamLAND International-presentation

    Neutrino Telescope 2015　2015/03/02

  30. Broad overview of neutrino physics International-presentation

    International Workshop on KamLAND Geoscience　2015/01/15

  31. KamLAND : Geo-Neutrino Measurement in Japan International-presentation

    Muographers 2014　2014/11/12

  32. The KamLAND-Zen Double Beta Decay Experiment with 136Xe International-presentation

    Research Progress Meetings at LBNL　2014/09/09

  33. Results from KamLAND-Zen International-presentation

    XXVI Conference on Neutrino Physics and Astrophysics (Neutrino 2014)　2014/06/02

  34. CeLAND実験:ステライルニュートリノ 探索における系統誤差の評価

    日本物理学会 第69回 年次大会（東海大学）　2014/03/27

  35. Liquid Scintillator for Neutrinoless Double Beta Decay Search

    日本物理学会 第69回 年次大会（東海大学）　2014/03/27

  36. CeLAND: KamLANDを用いた ステライルニュートリノ探索実験

    「ニュートリノフロンティア」研究会　2013/12/07

  37. KamLAND2-Zen実験用大光量 液体シンチレータ開発の現状

    日本物理学会 ２０１３年 秋季大会（高知大学）　2013/09/20

  38. Past and Present Experiments of Geo Neutrinos International-presentation

    13th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2013)　2013/09/08

  39. KamLAND and Long Range Reactor Neutrino Sensitivities International-presentation

    The International Workshop on Non-Accelerator New Physics (NANPino-2013)　2013/06/24

  40. Spallation Background International-presentation

    3rd International Open Working Group Meeting for Hyper-Kamiokande　2013/06/21

  41. KamLAND2-Zen

    公開シンポジウム「天文学・宇宙物理学中規模計画の展望」　2013/05/28

  42. ４世代ニュートリノ

    極低バックグラウンド素粒子原子核研究懇談会　2013/04/23

  43. ２重ベータ崩壊探索実験

    ニュートリノフロンティアの融合と進化　2013/04/21

  44. Results of Geo Neutrino and Xenon Experiment with KamLAND International-presentation

    Symposium on the Life and Science of Dr. Raju Raghavan　2012/10/20

  45. KamLAND-Zenにおける136Xe二重ベータ崩壊探索のためのバックグラウンド評価２

    日本物理学会 第６７回 年次大会（関西学院大学）　2012/03/24

  46. Geo Neutrino: Experiment International-presentation

    6th International Workshop on Low Energy Neutrino Physics　2011/11/09

  47. Status of Reactor Neutrino Oscillation and Geo Neutrino Measurement in KamLAND International-presentation

    The 3rd GCOE International Symposium on "Weaving Science Web beyond Particle-Matter Hierarchy"　2011/02/17

  48. KamLAND International-presentation

    11th International Workshop on Next generation Nucleon Decay and Neutrino Detectors　2010/12/14

  49. KamLAND: status and prospects International-presentation

    Neutrino Geoscience 2010　2010/10/06

  50. KamLAND実験における反ニュートリノ観測の現状

    日本物理学会 ２０１０年 秋期大会（九州工業大学）　2010/09/11

  51. Directional Studies with MeV Electron Anti-Neutrinos International-presentation

    LBNE Collaboration Meeting 2010　2010/01/28

  52. Muon Spallation Products in KamLAND International-presentation

    14th Geant4 Users Workshop　2009/10/15

  53. KamLAND Results International-presentation

    22nd International Workshop on Weak Interactions and Neutrinos (WIN'09)　2009/09/14

  54. KamLAND実験における宇宙線ミューオン起源バックグラウンドの研究

    日本物理学会 ２００９年 秋期大会（甲南大学）　2009/09/10

  55. KamLAND Results International-presentation

    Neutrino Oscillation Workshop (NOW 2008)　2008/09

  56. Status of KamLAND Anti-Neutrino Analysis and Future Prospects International-presentation

    the 6th symposium of Tohoku University: The 21st Century COE Program "Exploring New Science by Bridging Particle-Matter Hierarchy"　2007/12

  57. Recent Results from KamLAND

    第２１回「宇宙ニュートリノ」研究会　2007/11

  58. KamLAND (anti neutrino status) International-presentation

    The tenth international conference on Topics in Astroparticle and Underground Physics (TAUP 2007)　2007/09/11

  59. Present Status and Future Prospects of KamLAND International-presentation

    International Workshop on "Double Beta Decay and Neutrinos" (DBD07)　2007/06/11

  60. Current Status and Future Prospects of KamLAND International-presentation

    The 6th KEK Topical Conference: Frontiers in Particle Physics and Cosmology (KEKTC6)　2007/02/06

  61. Prospects for Solar Neutrino Observation in KamLAND International-presentation

    The Joint Meeting of Pacific Region Particle Physics Communities (DPF2006+JPS2006…)　2006/10/29

  62. Directional measurement of anti-neutrinos International-presentation

    Neutrino Oscillation Workshop (NOW 2006)　2006/09/09

  63. Neutrinos from the Sun : Observation International-presentation

    the 4th symposium of Tohoku University: The 21st Century COE Program "Exploring New Science by Bridging Particle-Matter Hierarchy"　2006/06/28

  64. カムランドにおける地球ニュートリノの観測と今後の見通し

    第１８回「宇宙ニュートリノ」研究会　2005/10/11

  65. Geoneutrino Detection in KamLAND International-presentation

    Second Joint Meeting of the Nuclear Physics Divisions of the American Physical Society and The Physical Society of Japan　2005/09/18

  66. KamLANDにおけるニュートリノ振動の証拠

    11th ICEPP Symposium　2005/02/20

  67. Latest Status of KamLAND Oscillation Analysis and Future Prospect International-presentation

    32nd international conference on High Energy Physics　2004/08/16

  68. KamLAND検出器の液体シンチレータに溶存するクリプトンの検出

    日本物理学会 第57回 年次大会 (立教大学)　2002/09/25

  69. ガドリニウム含有液体シンチレータの開発研究

    日本物理学会 第57回 年次大会 (立命館大学)　2002/03/25

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Research Projects 16

  1. Search for Majorana neutrino mass with the world's best sensitivity

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (S)

    Institution: Tohoku University

    2022/04/27 - 2027/03/31

  2. マヨラナニュートリノ質量検証のためのキセノン二重ベータ崩壊実験の高感度化

    清水 格

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(A)

    Institution: 東北大学

    2022/04/01 - 2025/03/31

  3. Exploration of Particle Physics and Cosmology with Neutrinos

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Kyoto University

    2018/06/29 - 2023/03/31

  4. Exploring the new era of particle physics through the observation of natural neutrinos and the proton decay search

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: The University of Tokyo

    2018/06/29 - 2023/03/31

  5. Research on the Majorana nature of neutrinos with a high-performance liquid scintillator detector

    Shimizu Itaru

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2019/04/01 - 2022/03/31

    More details Close

    A verification test to enhance the detector performance for the neutrino-less double beta-decay search, hunting for Majorana neutrinos, was performed by using a prototype detector. We realized a high-light-yield prototype detector by combining all improvements, such as new liquid scintillator, light-collecting mirror, and high efficiency light sensor. The present study shows that the expected improvements of the liquid scintillator detector performance are feasible, and increases the chance of observing the Majorana neutrino mass in the double beta-decay experiments.

  6. メタルスカベンジャーによる液体シンチレータ検出器の極低放射能化

    清水 格

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 新学術領域研究(研究領域提案型)

    Category: 新学術領域研究(研究領域提案型)

    Institution: 東北大学

    2017/04/01 - 2019/03/31

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    ニュートリノや暗黒物質が関わる希少事象探索は、宇宙・素粒子の未解決問題を解き明かす鍵となっていると考えられており、神岡地下で進行する極低放射能環境を活用した実験的研究の重要性が高まっている。新しい純化手法の候補として、有機合成分野において近年開発が進んでいるメタルスカベンジャー（金属捕捉材）による吸着法が挙げられる。 本研究では、これまで小規模装置で開発を行ってきたシリカゲルにアミノプロピル基を付けたメタルスカベンジャーによる放射性重金属の吸着純化技術をさらに発展させ、十分な純化速度が得られる液体シンチレータ純化装置の製作・稼働を行い、液体シンチレータ検出器における主要なバックグラウンド源に対する除去率を評価する。これまでの研究において、液体シンチレータの主成分であるリニアアルキルベンゼン（LAB）を130 L/h程度で純化する直径10 cmの直管型吸着カラムを製作した。感度波長において9 cm 光透過率は0.24%以内で安定しており、純化してもLABの高い光透過率が維持できることを示した。また、LABに発光剤を添加した液体シンチレータの発光量についても誤差2%の範囲内で有意な変化は見られず、発光性能への影響が十分に小さいことを確認した。放射性鉛除去についてはLABの流量を最適化しても、4回までの循環では目標の90%の除去率が達成できなかった。そこで、吸着カラムの吸着層の厚みを2 cmから4 cmに拡張することでメタルスカベンジャーの使用量を約2倍に増やし、カラムプロセスにおける鉛吸着効率の向上を試みた。その結果、3回の循環によって約90.4±0.4%の除去率を達成できることが分かった。本研究によって、メタルスカベンジャーによる吸着純化は液体シンチレータの成分を変化させずに放射性鉛を除去する実用的な方法であることが示された。

  7. キセノンを用いた二重ベータ崩壊実験のための新型液体シンチレータ検出器の開発

    清水 格

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 新学術領域研究(研究領域提案型)

    Category: 新学術領域研究(研究領域提案型)

    Institution: 東北大学

    2016/04/01 - 2018/03/31

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    キセノン含有液体シンチレータを用いてニュートリノを放出しない二重ベータ崩壊を探索するKamLAND-Zen実験では、検出器の極低放射線環境と拡張性において非常に優れた性能を発揮し、世界の実験を大きくリードしている。これまでの液体シンチレータ検出器は、光到達時間から再構成した位置情報のみを基にして発光点がどちらの層にあるかを区別してきたが、本研究ではこれに発光時定数の情報を加えた検出器を開発する。二重ベータ崩壊核が存在する内層に短時定数発光、外層に長時定数発光の液体シンチレータを導入し、発光時間波形の違いによって外層での発光の寄与の有無を判定する。これまでの研究で大型の検出器において使用実績のあるプソイドクメン（PC）とリニアアルキルベンゼン（LAB）をベースとした液体シンチレータを比較して、発光時定数に違いが現れることを確認している。シンチレーション光に対する吸収・再発光や散乱の効果を正確に評価するため、発光時間波形・波長情報と散乱角度を同時に測定する光学パラメータ測定装置を製作した。暗室内部で角度依存性を自動スキャンするため、遠隔制御のロータリーステージを用いている。LABベースの液体シンチレータを用いて、波長360 nmの吸収に対する再発光確率、及び長波長（> 400 nm）の散乱確率とその角度依存性を測定した。これらの結果を入力値とした光学シミュレーションを行うことで、正確な集光率及び発光時間波形の予測から発光点識別能を評価できるようになる。

  8. Study of Majorana Neutrino Mass with High Luminance Liquid Scintillator Detector

    Shimizu Itaru, KOGA MASAYUKI, IKEDA HARUO, GANDO AZUSA

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2015/04/01 - 2018/03/31

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    The development of a liquid scintillator detector to search for the Majorana neutrino mass was performed. We found that molecular sieve and activated charcoal are effective to remove light absorbing materials in the liquid scintillator, resulting in improved performance. The increase of the light output and transparency of the scintillator will enhance the detector performance. The present study enables us to reduce the cost of constructing a large detector and increases the chance of observing the Majorana neutrino mass with a liquid scintillator detector.

  9. メタルスカベンジャーによる極低放射能化技術の開発

    清水 格

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 新学術領域研究(研究領域提案型)

    Category: 新学術領域研究(研究領域提案型)

    Institution: 東北大学

    2015/04/01 - 2017/03/31

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    世界をリードする地下素核研究に向けて実験の一層の高感度化を実現するためには、低放射能化技術の強化が必要である。本研究では、メタルスカベンジャーを用いた放射性重金属の吸着手法を開発するため、液体シンチレータ中の金属に対する除去率を評価した。原子核反応を起源とする放射性金属を液体シンチレータ中に溶かしこませるため、ラドンガスのバブリングによって放射性鉛を液中で内部生成させた。メタルスカベンジャーの候補を選定するため、５社１２製品の試薬に対してバッチプロセスによる鉛の吸着除去試験を行った。除去率が高いものに対しては試薬を増量した吸着試験も行い、最大約95%の除去率が得られることを確認した。また、実機の純化では液体シンチレータを試薬入りのカラムに連続して送り込むカラムプロセスによる吸着が必要となるため、小規模な装置を構築しカラムプロセスでの吸着性能を評価した。その結果、最も高い吸着性能を示したシリカゲルにアミノプロピル基を付けたメタルスカベンジャーが候補として有力であることが分かった。また、カラムプロセスでは一定流量で処理し続けても除去率は維持されることを確認した。吸着材の使用量あたりの除去率が最大となるように吸着条件を決定すると、94%の除去率が得られた20 mmの吸着層の長さが最適な条件となる。このカラムプロセスを繰り返すと除去率は増大し、最大98%の除去率が得られる。純水と液体シンチレータを撹拌する液液抽出法での純化では最大80%程度の除去率であったことから、メタルスカベンジャーは極性の小さい有機金属に対しても吸着性能を示している可能性がある。また、一定流量で処理し続けても除去率は維持されることを確認した。さらに、液体シンチレータ中の発光材（PPO）の吸着による発光量の低下や不純物混入による光透過率の低下が起こらないことを確認した。

  10. Development of Double-Layer Liquid Scintillator Detector with Different Wavelengths for Neutrino Research

    SHIMIZU ITARU, HAYASHI Ayumi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2015/04/01 - 2017/03/31

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    We aim to achieve the discrimination of light output points to reduce backgrounds in a double-layer liquid scintillator detector, based on a light sensor sensitive to the wavelengths of the light source. Using a small prototype, we performed photon counting of the liquid scintillator with different wavelengths in scintillation using a combined system which consists of a wavelength shifting plate and a photomultiplier tube, and confirmed a discrimination ability as expected from a simulation. As a consequence, the study has reached the stage to start to discuss a detailed plan for a future large detector to discriminate light output points.

  11. A Study for the 4th Neutrino Search with KamLAND

    NAKAMURA KENGO, SHIMIZU Itaru, MATSUDA Sayuri

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2013/04/01 - 2016/03/31

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    Re-analysis of past reactor neutrino experiments is suggesting the existence of the 4th neutrinos. KamLAND experiment that has achieved important measurements of the neutrino oscillation parameters has a potential to explore the 4th neutrinos. Technical design of implementing an anti-neutrino generator into the KamLAND has been developed in this study. It has been shown that it is feasible to perform an experiment to explore the 4th neutrinos with KamLAND.

  12. Study of Double Beta Decay with High Light-Concentrating Liquid Scintillator Detector

    SHIMIZU Itaru

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (A)

    Category: Grant-in-Aid for Young Scientists (A)

    Institution: Tohoku University

    2011/04/01 - 2015/03/31

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    The development of devices highly sensitive to neutrino-less double-beta decays using isotopically enriched xenon was performed. The specially-shaped light-concentrating mirrors for the large volume liquid scintillator detector (KamLAND) were produced from aluminum metalizing PET film, and the increase of light collection efficiencies for scintillation light coming from distant points was confirmed. In addition, the purification by distillation and adsorption to enhance the optical performance of linear-alkylbenzene-based liquid scintillator was performed, resulting in better performance than the original liquid scintillator in use. The present study allows us to suggest a specific plan to test the inverted hierarchy neutrino masses by the neutrino-less double-beta decay experiment.

  13. Development of CdWO4 Crystal Scintillator for Potassium Geoneutrino Measurement

    SHIMIZU Itaru

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2011 - 2012

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    The development of CdWO4 crystal scintillator sensitive to low-energy anti-neutrinos emitted by Potassium nucleus decays was performed to measure the radiogenic heat contribution in Earth's heat production, and its performance was evaluated. The prototype detector based on measured parameters was already designed, and built a realistic technic for a new anti-neutrino detection device. As a consequence, the study has reached the stage to start to discuss a plan for a future large detector to measure the Potassium anti-neutrino flux at about 20% uncertainty.

  14. 低エネルギー太陽ニュートリノ観測によるCNOサイクルの検証の研究

    清水 格

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 若手研究(B)

    Category: 若手研究(B)

    Institution: 東北大学

    2006 - 2007

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    KamLAND実験では、これまでの原子炉・地球反ニュートリノ観測に加え、さらに低エネルギーの太陽ニュートリノ観測を目指している。太陽内部の核融合反応では、ppチェーンとよばれる一連の反応と、炭素・窒素・酸素の原子核が触媒的に作用するCNOサイクルとよばれる一連の反応が関係する。本研究では、これまでに観測されていないCNOサイクルで作られるニュートリノを高精度で測定し、太陽モデルにおける重元素量の検証を目標とする。 CNO太陽ニュートリノの観測を行うためには、現在約40mBq/m^3の崩壊率で最大のバックグラウンド源となっている^<210>Pbを3桁以上削減する必要がある。液体シンチレータの純化には蒸留法を用いるが、小規模実験装置においてPbを約4桁の削減できることが確認されている。平成18年度は、前年度において建設された蒸留装置を用いてKamLAND検出器の液体シンチレータの純化を行った。しかし、一回の循環で^<210>Pbに対して約1/4程度の除去率しか得られていないことが分かった。予測よりも悪い除去率となった原因として、循環の途中で純化後と純化前の液体シンチレータが検出器内で混合してしまったことが挙げられる。しかし、混合が起きる前の除去率も2桁程度であったことから蒸留装置自体にも問題があると考えられる。そこで、^<210>Pbに対する除去性能を高めるために、蒸留装置自体の改造を計画した。この改造により、小規模実験装置と同様の蒸留のコントロールが可能となり、目標の削減レベルが得られることが期待できる。また、循環中の液体シンチレータの混合を防ぐための温度コントロールのための熱交換器を導入した。今後は、再純化を行い改造後の蒸留装置の性能評価を行うとともに、^<210>Pbの削減後に最大のバックグラウンドとなる宇宙線起源の^<11>Cの解析的な除去効率を確認する。

  15. 原子炉を使ったニュートリノ振動パラメータの精密測定

    清水 格

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特別研究員奨励費

    Category: 特別研究員奨励費

    Institution: 東北大学

    2004 - 2005

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    KamLAND (Kamioka Liquid Scintillator Anti-Neutrino Detector)実験では、液体シンチレータの大発光特性を生かし、平均距離、約180kmの原子炉や地球から飛来する反ニュートリノの観測を行なっている。昨年度までの原子炉ニュートリノの研究で、99.998%の信頼度でニュートリノの消失を確認すると同時に、ニュートリノ振動の重要な特徴となるスペクトルの歪みも99.78%の信頼度で確かめられた。KamLANDにおいて振動パラメータをさらに精密に測定するには、統計量の拡大と系統誤差の縮小が必要となる。統計量の拡大にはこれまでの半径5.5m球の有効体積(697m^3)を拡大し検出器外側のデータも解析に取り入れることが目標となる。 有効体積を拡大するにあたって、最も顕著なバックグラウンドは検出器外側と低エネルギー領域にある偶発イベントであるが、これらのイベントは検出閾値を高くすることで除かれる。また、ミューオン起源の高速中性子は検出器外側に集中する。エネルギーの高い領域では、高速中性子のバックグラウンドが支配的になるため、ミューオンの軌跡と中性子生成のプロセスを含めた詳細なシミュレーションが必要となる。 検出器に到達する高速中性子数を見積もる際に、最も不定性が大きいのはミューオンによる中性子の生成プロセスである。この不定性を抑えるために、検出器外側にある外部検出器を通過したミューオンを用いて、中性子生成量に対する校正を行なう。外部検出器との同時計測を用いて観測された中性子生成量とミューオンフラックスから予想される生成量との違いは1.5倍程度であった。また、ミューオンが外部検出器を通過しない場合でも、約半数はミューオンがおこす電磁シャワーによって外部検出器で観測できることが分かった。この結果、原子炉ニュートリノの観測エネルギー領域において高速中性子のバックグラウンドは全体積で0.002events/day程度となり、原子炉ニュートリノイベント数0.8events/dayに対して十分に小さくなることが確かめられた。 2002年3月9日から2004年10月31日までのデータ(749.1日)を用いて解析を行い、3.0MeV以上のエネルギー領域において有効体積をこれまでの半径5.5m球から半径6.0m球に拡大したところ、統計量は1.3倍となり振動パラメータに対する感度が向上した。その結果、>99%の信頼度で振動パラメータを質量2乗差Δm^2=7.9x10^<-5>eV^2付近のみに絞り込むことができた。

  16. ニュートリノ観測 Competitive

    System: SCF System for Establishment and Support of Center's of Excellence

    2001/04 -

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Social Activities 4

  1. GSA（ジオ・スペース・アドベンチャー）

    2006/07/15 - 2006/07/17

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    岐阜県飛騨市の神岡鉱山内で行なっている実験を一般公開するイベント、GSA（ジオ・スペース・アドベンチャー）に参加し、東北大学のKamLAND検出器の紹介を行なった。より多くの人に研究内容を深く知ってもらうため、展示品、ポスターなどを準備し、一般向けのニュートリノ研究の講演も担当した。

  2. 夢のたまご塾 飛騨アカデミー

    2013/08/09 -

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    飛騨市が主催する小中学生を対象とした夏セミナー 講義、カムランド見学

  3. スーパーサイエンススクール (SSH)

    2013/08/07 -

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    飛騨市と連携したスーパーサイエンススクール (SSH)指定校の研修の受け入れ 講義、カムランド見学

  4. 東北大学イノベーションフェア

    2007/10/05 -

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    東北大学の研究成果を広く一般に公開し、理解を得るとともに、関連企業との情報交換の場を提供する。プレゼンテーション部門において、世界に類のない超高感度を目指すカムランドの液体シンチレーターの蒸留プラントの建設と運転による結果を紹介した。