TOHOKU UNIVERSITY Researchers

Details of the Researcher

Home

日本語 English

Haruo Ikeda

Section

Research Center for Neutrino Science

Job title

Associate Professor

Degree

Doctor of Science (Tohoku University)

researchmap

https://researchmap.jp/read0143865

J-GLOBAL ID

200901033581818363

Professional Memberships 1

日本物理学会

2000/03 - Present

Research Areas 1

Natural sciences / Particle, nuclear, cosmic-ray, and astrophysics - experiment /

Papers 60

Background Stability and Annual Modulation Test Using PICOLON Ultra-Pure NaI(Tl) Detector

K Kotera, D Chernyak, H Ejiri, K Fushimi, K Hata, R Hazama, T Iida, H Ikeda, K Imagawa, K Inoue, H Ito, T Kishimoto, M Koga, A Kozlov, K Nakamura, R Orito, T Shima, Y Takemoto, S Umehara, Y Urano, K Yasuda, S Yoshida

Progress of Theoretical and Experimental Physics　2025　(12)　2025/11/13
Publisher: Oxford University Press (OUP)
DOI： 10.1093/ptep/ptaf160 　

eISSN： 2050-3911

More details Close

Abstract The dark matter observation claimed by the DAMA/LIBRA experiment has been a long-standing puzzle within the particle physics community. NaI(Tl) crystals with radiopurity comparable to DAMA/LIBRA’s are essential for adequate verification. Existing experiments using a NaI(Tl) target have been hampered by the high radioactivity concentration of NaI(Tl) crystals. The Pure Inorganic Crystal Observatory for LOw-energy Neutr(al)ino (PICOLON) experiment conducts an independent search for Weakly Interacting Massive Particles using the highest-purity NaI(Tl) crystals. In 2020, a PICOLON NaI(Tl) crystal (Ingot#85) reached the same purity level as DAMA/LIBRA crystals. The DAMA/LIBRA group has stressed that verifying their signal requires high-purity NaI(Tl) crystals with long-term stability. Based on a six-month measurement, we have confirmed the long-term stability of its radiopurity. This stability provides a significant advantage for future efforts to adequately verify the DAMA/LIBRA result using NaI(Tl) crystals. In this paper, we present the background stability of purity in the Ingot#94 NaI(Tl) detector, which was produced using the Ingot#85 purification method, along with the first annual modulation search conducted by the PICOLON experiment.
Limits on the Low-energy Electron Antineutrino Flux from the Brightest Gamma-Ray Burst of All Time

S. Abe, T. Araki, S. Chauhan, K. Chiba, T. Eda, M. Eizuka, Y. Funahashi, A. Furuto, A. Gando, Y. Gando, S. Goto, T. Hachiya, K. Hata, K. Ichimura, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, A. Marthe, Y. Matsumoto, T. Mitsui, H. Miyake, D. Morita, R. Nakajima, K. Nakamura, R. Nakamura, R. Nakamura, J. Nakane, T. Ono, H. Ozaki, K. Saito, T. Sakai, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, K. Tachibana, K. Tamae, H. Watanabe, K. Watanabe, S. Kurosawa, Y. Urano, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, Z. Fu, S. Ghosh, 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, Ö. Penek, H. Song, A. Li, S. N. Axani, M. Garcia, M. Sarfraz

The Astrophysical Journal　981　(2)　192-192　2025/03/07
Publisher: American Astronomical Society
DOI： 10.3847/1538-4357/ad9c36 　

ISSN： 0004-637X

eISSN： 1538-4357

More details Close

Abstract The electron antineutrino flux limits are presented for the brightest gamma-ray burst (GRB) of all time, GRB221009A, over a range of 1.8–200 MeV using the Kamioka Liquid Scintillator Antineutrino Detector. Using multiple time windows ranging from minutes to days surrounding the event to search for electron antineutrinos coincident with the GRB, we set an upper limit on the flux under the assumption of several power-law neutrino source spectra, with power-law indices ranging from 1.5 to 3 in steps of 0.5. No excess was observed in any time windows ranging from seconds to days around the event trigger time T ₀. For a power-law index of 2 and a time window of T ₀ ± 500 s, a flux upper limit of 2.34 × 10⁹ cm⁻² was calculated. The limits are compared to the results presented by IceCube.
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

More details Close

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.
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
Development of a Method to Measure Trace Levels of Uranium and Thorium in Scintillation Films Peer-reviewed

K Ichimura, K Chiba, Y Gando, H Ikeda, Y Kishimoto, M Kurasawa, K Nemoto, A Sakaguchi, Y Takaku, Y Sakakieda

Progress of Theoretical and Experimental Physics　2024　(6)　2024/05/10
Publisher: Oxford University Press (OUP)
DOI： 10.1093/ptep/ptae071 　

eISSN： 2050-3911

More details Close

Abstract We have established a method to measure picograms-per-gram (pg g−1) levels of 238U and 232Th in scintillation films by combining the dry ashing method and inductively coupled plasma mass spectrometry. Trace amounts of 238U and 232Th were measured in up to 2 g of scintillation film with almost 100% collection efficiency. This paper details the experimental procedure, including the pretreatment of the samples and labware, detection limit of the method, collection efficiencies of 238U and 232Th, and measurement of 238U and 232Th in a polyethylene naphthalate film. This method is also applicable to 238U and 232Th measurements in other low-background organic materials for rare-event search experiments.
Development of a low-background HPGe detector at Kamioka Observatory Peer-reviewed

K Ichimura, H Ikeda, Y Kishimoto, M Kurasawa, A A Suzuki, Y Gando, M Ikeda, K Hosokawa, H Sekiya, H Ito, A Minamino, S Suzuki

Progress of Theoretical and Experimental Physics　2023/11/08
Publisher: Oxford University Press (OUP)
DOI： 10.1093/ptep/ptad136 　

eISSN： 2050-3911

More details Close

Abstract A new ultra-low background high-purity germanium (HPGe) detector has been installed at the Kamioka underground experimental site. The background count rate in the energy range from 40 keV to 2700 keV is about 25% lower than that of the first HPGe detector installed in 2016, which has the same detector specification and similar shielding geometry. This paper describes the shielding configuration, including the cleaning of the material surface, the comparison of calibration data and simulation, the time variation of the background spectra, the sample measurement procedure, and some results of the radioactivity in the selected samples.
PICOLON dark matter search project by large-volume NaI(Tl) scintillator

Ken-Ichi Fushimi, "K. Fushimi", "D. Chernyak", "H. Ejiri", "K. Hata", "R. Hazama", "T. Iida", "H. Ikeda", "K. Imagawa", "K. Inoue", "H. Ito", "T. Kisimoto", "M. Koga", "K. Kotera", "A. Kozlov", "K. Nakamura", "R. Orito", "T. Shima", "Y. Takemoto", "S. Umehara", "Y. Urano", "Y. Yamamoto", "K. Yasuda", "S. Yoshida"

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)　1404-1404　2023/08/23
Publisher: Sissa Medialab
DOI： 10.22323/1.444.1404 　
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)　2023/05/22
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevc.107.054612 　

ISSN： 2469-9985

eISSN： 2469-9993
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)　2023/04/19
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevd.107.072006 　

ISSN： 2470-0010

eISSN： 2470-0029
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)　2023/01/30
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevlett.130.051801 　

ISSN： 0031-9007

eISSN： 1079-7114
Crystal growth of high-purity NaI(Tl)

Fushimi K., Chernyak D., Ejiri H., Hata K., Hazama R., Iida T., Ikeda H., Imagawa K., Inoue K., Ito H., Kisimoto T., Koga M., Kotera K., Kozlov A., Nakamura K., Orito R., Shima T., Takemoto Y., Umehara S., Urano Y., Yamamoto Y., Yasuda K., Yoshida S.

Journal of the Japanese Association for Crystal Growth　49　(4)　n/a　2023
Publisher: The Japanese Association for Crystal Growth
DOI： 10.19009/jjacg.49-4-03 　

ISSN： 0385-6275

eISSN： 2187-8366

More details Close

Highly radiopure NaI(Tl) crystal has been developed to investigate cosmic dark matter. The dark matter problem is one of the essential subjects in particle physics and cosmology. Despite the many null results in the dark matter search, one group (DAMA/LIBRA) reported a significant annual modulation in the energy spectrum, which can be interpreted as the dark matter signal. This unknown signal must be a purer NaI(Tl) crystal. The PICOLON project has developed a highly radiopure NaI(Tl) crystal. They purified the NaI(Tl) crystal with combined methods; re-crystallization and resin. The ⁴⁰K were effectively removed from the NaI by the re-crystallization method. On the other hand, they successfully removed ²¹⁰Pb by selecting the appropriate resin. The concentration of radioactive impurities in their NaI(Tl) crystal reached below their goals.
A study of self-vetoing balloon vessel for liquid-scintillator detectors

S. Obara, Y. Gando, S. Ieki, H. Ikeda, K. Ishidoshiro, R. Nakamura

Journal of Physics: Conference Series　2374　(1)　012111-012111　2022/11/01
Publisher: IOP Publishing
DOI： 10.1088/1742-6596/2374/1/012111 　

ISSN： 1742-6588

eISSN： 1742-6596

More details Close

KamLAND-Zen searches for neutrinoless double-beta decay with an ultra-pure liquid-scintillator (LS) filled with a custom-made clean nylon balloon. The primary backgrounds are radioactive impurities such as uranium and thorium series. To reduce them, we studied a self-vetoing balloon-shaped vessel for a future upgrade program, “KamLAND2-Zen”. We selected Polyethylene-Naphthalate (PEN) film which emit fluorescent light and performed the feasibility studies. Owing to its scintillation properties, ²¹⁴Bi background could be identified in the KamLAND2-Zen. Moreover, thanks to the different waveforms between the LS and the PEN, we can apply the pulse-shape-discrimination for ²¹²Bi-Po pileup background. We evaluated its background rejection efficiency as more than 90%. Resulting from these studies, it is possible to remove restrictions on fiducial volume in KamLAND2-Zen.
Abundances of uranium and thorium elements in Earth estimated by geoneutrino spectroscopy 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, 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)　2022/08/11
Publisher: American Geophysical Union (AGU)
DOI： 10.1029/2022gl099566 　

ISSN： 0094-8276

eISSN： 1944-8007

More details Close

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

More details Close

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.
KamLAND’s search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube 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, 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　2022/07
Publisher: Elsevier BV
DOI： 10.1016/j.astropartphys.2022.102758 　

ISSN： 0927-6505
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

Astrophysical Journal　927　(1)　2022/03/01

DOI： 10.3847/1538-4357/ac4e7e 　

ISSN： 0004-637X

eISSN： 1538-4357
Limits on Astrophysical Antineutrinos with the KamLAND Experiment

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

Astrophysical Journal　925　(1)　2022/01/20

DOI： 10.3847/1538-4357/ac32c1 　

ISSN： 0004-637X

eISSN： 1538-4357
Search for Solar Flare Neutrinos with the KamLAND Detector Peer-reviewed

Kamland Collaboration, 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

Astrophysical Journal　924　(2)　2022/01/10

DOI： 10.3847/1538-4357/ac35d1 　

ISSN： 0004-637X

eISSN： 1538-4357
PICOLON dark matter search project

K. Fushimi, D. Chernyak, H. Ejiri, K. Hata, R. Hazama, T. Iida, H. Ikeda, K. Imagawa, K. Inoue, H. Ishiura, H. Ito, T. Kishimoto, M. Koga, K. Kotera, A. Kozlov, K. Nakamura, R. Orito, T. Shima, Y. Takemoto, S. Umehara, Y. Urano, Y. Yamamoto, K. Yasuda, S. Yoshida

Journal of Physics: Conference Series　2156　(1)　012045-012045　2021/12/01
Publisher: IOP Publishing
DOI： 10.1088/1742-6596/2156/1/012045 　

ISSN： 1742-6588

eISSN： 1742-6596

More details Close

Abstract PICOLON (Pure Inorganic Crystal Observatory for LOw-energy Neutr(al)ino) aims to search for cosmic dark matter by high purity NaI(Tl) scintillator. We developed extremely pure NaI(Tl) crystal by hybrid purification method. The recent result of 210Pb in our NaI(Tl) is less than 5.7 μBq/kg. We will report the test experiment in the low-background measurement at Kamioka Underground Laboratory. The sensitivity for annual modulating signals and finding dark matter particles will be discussed.
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　2021/08/01
Publisher: IOP Publishing
DOI： 10.1088/1748-0221/16/08/p08023 　

eISSN： 1748-0221
Low-energy astrophysics with KamLAND

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 　
Search for Low-energy Electron Antineutrinos in KamLAND Associated with Gravitational Wave Events 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. Kozlov, D. Chernyak, Y. Takemoto, S. Yoshida, S. Umehara, K. Fushimi, A. K. Ichikawa, 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　909　(2)　116-116　2021/03/01
Publisher: American Astronomical Society
DOI： 10.3847/1538-4357/abd5bc 　

ISSN： 0004-637X

eISSN： 1538-4357
Precision Analysis of the Xe 136 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)　192501　2019/05/13

DOI： 10.1103/PhysRevLett.122.192501 　

ISSN： 0031-9007

eISSN： 1079-7114
Kamland-zen

S. Abe, A. Gando, Y. Gando, T. Hachiya, S. Hayashida, K. Hosokawa, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, T. Kinoshita, M. Koga, T. Mitsui, H. Miyake, K. Nakamura, S. Obara, A. Ohno, N. Ohta, S. Ohtsuka, H. Ozaki, T. Sato, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, Y. Wada, H. Watanabe, A. Kozlov, D. Chernyak, Y. Takemoto, S. Umehara, S. Yoshida, K. Fushimi, S. Hirata, B. E. Berger, B. K. Fujikawa, L. A. Winslow, J. Ouellet, E. Krupczak, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, T. O’Donnell, J. A. Detwiler, S. Enomoto, M. P. Decowski

Neutrino 2018 - 28th International Conference on Neutrino Physics and Astrophysics, Conference Proceedings　2018
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)　2017/12

DOI： 10.3847/2041-8213/aa9a32 　

ISSN： 2041-8205

eISSN： 2041-8213
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)　L34　2016/10

DOI： 10.3847/2041-8205/829/2/L34 　

ISSN： 2041-8205

eISSN： 2041-8213
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)　109903　2016/08

DOI： 10.1103/PhysRevLett.117.082503 　

ISSN： 0031-9007

eISSN： 1079-7114
Dark matter search project PICO-LON Peer-reviewed

K. Fushimi, H. Ejiri, R. Hazama, H. Ikeda, K. Imagawa, K. Inoue, G. Kanzaki, A. Kozlov, R. Orito, T. Shima, Y. Takemoto, Y. Teraoka, S. Umehara, K. Yasuda, S. Yoshida

Journal of Physics: Conference Series　718　(4)　2016/06/09
Publisher: Institute of Physics Publishing
DOI： 10.1088/1742-6596/718/4/042022 　

ISSN： 1742-6596 1742-6588

eISSN： 1742-6596
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
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
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
Search for the proton decay mode p → ν ¯ K+ with KamLAND SEARCH for the PROTON DECAY MODE ⋯ K. ASAKURA et al 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 - Particles, Fields, Gravitation and Cosmology　92　(5)　2015/09/23
Publisher: American Physical Society
DOI： 10.1103/PhysRevD.92.052006 　

ISSN： 1550-2368 1550-7998
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
Results from KamLAND-Zen 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, 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

AIP Conference Proceedings　1666　(170003)　1-8　2015/07/15
Publisher: American Institute of Physics Inc.
DOI： 10.1063/1.4915593 　

ISSN： 1551-7616 0094-243X
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
Results from KamLAND-Zen 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, 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　2015

DOI： 10.1063/14915593 　

ISSN： 0094-243X
KamLAND-PICO Dark Mater Search Project Peer-reviewed

K. Fushimi, Y. Awatani, H. Ejiri, R. Hazama, H. Ikeda, K. Imagawa, K. Inoue, A. Kozlov, R. Orito, T. Shima, R. Sugawara, K. Yasuda

Physics Procedia　61　67-73　2015
Publisher: Elsevier B.V.
DOI： 10.1016/j.phpro.2014.12.012 　

ISSN： 1875-3892 1875-3884
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　79-87　2015/01

DOI： 10.1016/j.nima.2014.09.050 　

ISSN： 0168-9002

eISSN： 1872-9576
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　88-96　2015/01

DOI： 10.1016/j.nima.2014.09.068 　

ISSN： 0168-9002

eISSN： 1872-9576
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
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
Purification of KamLAND-Zen liquid scintillator Peer-reviewed

Haruo Ikeda

AIP Conference Proceedings　1549　197-200　2013

DOI： 10.1063/1.4818107 　

ISSN： 0094-243X 1551-7616
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
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
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
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
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'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
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
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 - Nuclear Physics　81　(2)　2010/02/23
Publisher: American Physical Society
DOI： 10.1103/PhysRevC.81.025807 　

ISSN： 1089-490X 0556-2813
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)　025807-1-025807-14　2010/02

DOI： 10.1103/PhysRevC.81.025807 　

ISSN： 2469-9985

eISSN： 2469-9993
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'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
Precision Measurement of Neutrino Oscillation Parameters with KamLAND (vol 100, artn 221803, 2008) Peer-reviewed

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　(25)　2008/12

DOI： 10.1103/PhysRevLett.101.259901 　

ISSN： 0031-9007
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
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'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
Geo-neutrinos from KamLAND Peer-reviewed

H. Ikeda

The Gioi Publishers　289-293　2006/03
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
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
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
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
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. 16

Development of high-purity scintillators for the astroparticle physics

伏見賢一, 天羽悠太, Chernyak D., 江尻宏泰, 畑和実, 硲隆太, 飯田崇史, 池田晴雄, 今川恭四郎, 井上邦雄, 井上邦雄, 伊藤博士, 岸本忠史, 古賀真之, 古賀真之, 小寺健太, Kozlov A., 黒澤俊介, 黒澤俊介, 黒澤俊介, 永見未空, 中村健悟, 中村健悟, 西島渉悟, 折戸玲子, 坂口綾, 嶋達志, 高久雄一, 竹本康浩, 竹本康浩, 梅原さおり, 浦野雄介, 山路晃広, 山本祐平, 保田賢輔, 吉田斉

日本結晶成長学会誌(CD-ROM)　52　(2)　2025

ISSN： 2188-7268
Reducing noise on the low energy side by using machine learning

天羽悠太, CHERNYAK D., 江尻宏泰, 伏見賢一, 畑和実, 硲隆太, 飯田崇史, 池田晴雄, 今川恭四郎, 井上邦雄, 井上邦雄, 伊藤博士, 岸本忠史, 古賀真之, 古賀真之, 小寺健太, KOZLOV A., 中村健悟, 中村健悟, 折戸玲子, 嶋達志, 竹本康浩, 竹本康浩, 梅原さおり, 浦野雄介, 山本祐平, 保田賢輔, 吉田斉

応用物理・物理系学会中国四国支部合同学術講演会講演予稿集(CD-ROM)　2024　2024
Current status of PICOLON darkmatter seach using high-prity NaI(Tl) crystals

小寺健太, 伏見賢一, CHERNYAK D., 江尻宏泰, 畑和実, 硲隆太, 飯田崇史, 池田晴雄, 今川恭四郎, 井上邦雄, 伊藤博士, 岸本忠史, 古賀真之, KOZLOV A., 中村健悟, 中村健悟, 折戸玲子, 嶋達志, 竹本康浩, 竹本康浩, 梅原さおり, 浦野雄介, 浦野雄介, 山本祐平, 保田賢輔, 吉田斉

日本物理学会講演概要集(CD-ROM)　79　(2)　2024

ISSN： 2189-079X
PICOLON高純度NaI(Tl)結晶のバックグラウンド測定結果 3

小寺健太, 伏見賢一, CHERNYAK D., 江尻宏泰, 畑和実, 硲隆太, 飯田崇史, 池田晴雄, 今川恭四郎, 井上邦雄, 井上邦雄, 伊藤博士, 岸本忠史, 古賀真之, 古賀真之, KOZLOV A., 中村健悟, 中村健悟, 折戸玲子, 嶋達志, 竹本康浩, 竹本康浩, 梅原さおり, 浦野雄介, 山本祐平, 保田賢輔, 吉田斉, 吉田斉

日本物理学会講演概要集(CD-ROM)　78　(1)　2023

ISSN： 2189-079X
Crystal growth of high-purity NaI(Tl)

伏見賢一, Chernyak D., 江尻宏泰, 畑和実, 硲隆太, 飯田崇史, 池田晴雄, 今川恭四郎, 井上邦雄, 井上邦雄, 伊藤博士, 岸本忠史, 古賀真之, 古賀真之, 小寺健太, Kozlov A., 中村健悟, 中村健悟, 折戸玲子, 嶋達志, 竹本康浩, 竹本康浩, 梅原さおり, 浦野雄介, 山本祐平, 保田賢輔, 吉田斉

日本結晶成長学会誌(CD-ROM)　49　(4)　2023

ISSN： 2188-7268
高純度ヨウ化ナトリウムの結晶育成—Crystal growth of high-purity NaI(Tl)—特集バルク結晶の欠陥・不純物の制御と評価

伏見賢一, D. Chernyak, 江尻宏泰, 畑和実, 硲隆太, 飯田崇史, 池田晴雄, 今川恭四郎, 井上邦雄, 伊藤博士, 岸本忠史, 古賀真之, 小寺健太, A. Kozlov, 中村健悟, 折戸玲子, 嶋達志, 竹本康浩, 梅原さおり, 浦野雄介, 山本祐平, 保田賢輔, 吉田斉

日本結晶成長学会誌 Journal of the Japanese Association for Crystal Growth　49　(4)　1-11　2022
Publisher: 東京 : 日本結晶成長学会
ISSN： 2188-7268
Rare process in particle- and astro-physics investigated by ultrapure inorganic crystal scintillators

伏見賢一, 小寺健太, 折戸玲子, 浦野雄介, CHERNYAK Dmitry, 江尻宏泰, 岸本忠史, 嶋達志, 梅原さおり, 吉田斉, 畑和実, 池田晴雄, 井上邦雄, 古賀真之, 黒澤俊介, 硲隆太, 飯田崇史, 今川恭四郎, 保田賢輔, 伊藤博士, KOZLOV Alexandre, 中村健悟, 竹本康浩

日本セラミックス協会秋季シンポジウム講演予稿集(Web)　35th　2022
高純度NaI(Tl)検出器のバックグラウンド測定 2

小寺健太, 伏見賢一, CHERNYAK D., 江尻宏泰, 畑和実, 硲隆太, 飯田崇史, 池田晴雄, 今川恭四郎, 井上邦雄, 石浦宏尚, 伊藤博士, 岸本忠史, 古賀真之, KOZLOV A., 中村健悟, 中村健悟, 折戸玲子, 嶋達志, 竹本康浩, 竹本康浩, 梅原さおり, 浦野雄介, 保田賢輔, 吉田斉

日本物理学会講演概要集(CD-ROM)　77　(2)　2022

ISSN： 2189-079X
Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen (vol 117, 082503, 2016)

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)　2016/09

DOI： 10.1103/PhysRevLett.117.109903 　

ISSN： 0031-9007

eISSN： 1079-7114
20pAM-6 Study of Particle Identification in Liquid Scintillator using Imaging Detector

Takai T, Inoue K, Mitsui T, Watanabe H, Ishidoshiro K, Ikeda H, Shirahata Y, Soma K

Meeting Abstracts of the Physical Society of Japan　71　(0)　111-111　2016
Publisher: The Physical Society of Japan
DOI： 10.11316/jpsgaiyo.71.1.0_111 　

ISSN： 2189-079X
21aCA-11 Study for Directional Measurement of Electron Anti-neutrino in Liquid Scintillator

Souma K, Inoue K, Mitsui T, Watanabe H, Ishidoshiro K, Ikeda H, Shirahata Y, Takai T

Meeting Abstracts of the Physical Society of Japan　71　(0)　131-131　2016
Publisher: The Physical Society of Japan
DOI： 10.11316/jpsgaiyo.71.1.0_131 　

ISSN： 2189-079X
21aDK-4 The study for electron anti-neutrino directional measurement in liquid scintillator 1

Shirahata Y, Takai T, Ishio S, Inoue K, Mitsui T, Watanabe H, Ishidoshiro K, Ikeda H

Meeting Abstracts of the Physical Society of Japan　70　(0)　59-59　2015
Publisher: The Physical Society of Japan
DOI： 10.11316/jpsgaiyo.70.1.0_59 　

ISSN： 2189-079X
21aDK-5 The study for electron anti-neutrino directional measurement in liquid scintillator 2

Takai T, Shirahata Y, Ishio S, Inoue K, Mitsui T, Watanabe H, Ishidoshiro K, Ikeda H

Meeting Abstracts of the Physical Society of Japan　70　(0)　60-60　2015
Publisher: The Physical Society of Japan
DOI： 10.11316/jpsgaiyo.70.1.0_60 　

ISSN： 2189-079X
18aSG-5 反ニュートリノの方向検出に向けたリチウム含有液体シンチレータの開発(18aSG ニュートリノ検出器,素粒子実験領域)

白旗豊, 渡辺寛子, 池田晴雄, 井上邦雄

日本物理学会講演概要集　69　(2)　16-16　2014/08/22
Publisher: 一般社団法人日本物理学会
ISSN： 1342-8349
KamLAND-PICO project to search for cosmic dark matter

K. Fushimi, Y. Awatani, H. Ejiri, R. Hazama, H. Ikeda, K. Imagawa, K. Inoue, A. Kozlov, R. Orito, T. Shima, R. Sugawara, K. Yasuda

Proceedings of the 28th Workshop on Radiation Detector and Theis Uses, KEK Proceedings 2014-11, (2015) pp23　2014/07/14

More details Close

KamLAND-PICO project aims to search for WIMPs dark matter by means of NaI(Tl) scintillator. To investigate the WIMPs candidate whose cross section is as small as $10^{-9}$ pb, a pure NaI(Tl) crystal was developed by chemical processing and taking care of surroundings. The concentration of U and Th chain was reduced to $5.4\pm0.9$ ppt and $3.3\pm2.2$ ppt, respectively. It should be remarked that the concentration of $^{210}$Pb which was difficult to reduce reached to the high purity as $58\pm26$ $\mu$Bq/kg.
Recent status of the KamLAND experiment

F. Suekane, K. Eguchi, S. Enomoto, K. Furuno, Y. Gando, J. Goldman, H. Hanada, 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, M. Nakajima, T. Nakajima, H. Ogawa, K. Oki, K. Owada, I. Shimizu, J. Shirai, F. Suekane, A. Suzuki, K. Tada, O. Tajima, T. Takayama, K. Tamae, H. Watanabe, T. Taniguchi, Y. F. Wang, J. Busenitz, Z. Djurcic, K. McKinny, D. M. Mei, A. Piepke, E. Yakushev, B. Berger, R. N. Cahn, Y. D. Chan, X. Chen, S. J. Freedman, B. K. Fujikawa, K. T. Lesko, K. B. Luk, H. Murayama, D. R. Nygren, C. E. Okada, A. W. Poon, H. M. Steiner, L. Hannelius, G. A. Horton-Smith, R. D. McKeown, J. Ritter, B. Tipton, P. Vogel, C. E. Lane, P. Gorham, J. Learned, J. Maricic, S. Matsuno, S. Pakvasa, S. Dazeley, S. Hatakeyama, R. C. Svoboda, B. D. Dieterle, C. Gregory, J. Detwiler, G. Gratta, H. L. Liew, D. Murphree, N. Tolich, Y. Uchida, M. Batygov, S. Berridge, W. Bugg, H. Cohn, Y. Efremenko, Y. Kamyshkov, Y. Nakamura, L. DeBraeckeleer, C. Gould, H. Karwowski, D. Markoff, J. Messimore, K. Nakamura, R. Rohm, W. Tornow, A. Young

Nuclear Physics B - Proceedings Supplements　112　128-132　2002/11/01

ISSN： 0920-5632

Show all ︎Show first 5

Presentations 9

KamLAND-Zen International-presentation Invited

IKEDA Haruo

International Workshop on "Double Beta Decay and Underground Science" DBD18　2018/10/21
シンチレーションフィルムによる表面汚染測定法の開発

池田晴雄

日本物理学会２０１８年秋季大会　2018/09/15
LS-based 0vDBD detector International-presentation

International Workshop on Next Generation Nucleon Decay and Neutrino Detectors　2016/11/03
KamLANDの課題

極低放射能技術　2015/03/09
KamLANDでみるニュートリノの世界

2014年放射線夏の学校　2014/08/05
低バックグラウンド技術I

極低バックグラウンド素粒子原子核研究懇談会　2013/04/23
Purification of KamLAND-Zen liquid scintillator International-presentation

Low Radioactivity Techniques 2013　2013/04/10
Backgrounds for KamLAND-Zen experiment International-presentation

NEUTRINO 2012　2012/06/03
Geo-Neutrino Measurement with KamLAND International-presentation

The 6th International workshop of Applied Antineutrino Physics　2010/08/03

Show all Show first 5

Research Projects 7

ヨウ化ストロンチウム結晶を用いた二重電子捕獲及び暗黒物質探索への挑戦

丸藤亜寿紗, 細川佳志, 池田晴雄

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

Institution: 帯広畜産大学

2025/04/01 - 2029/03/31
背景事象識別能力を有する高感度シンチレーターによる宇宙暗黒物質探索

池田晴雄

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

Institution: 東北大学

2021/04/01 - 2024/03/31

More details Close

宇宙暗黒物質は古くからその存在が示唆されているが、観測を肯定・否定する様々な実験が存在し混沌とした状況が続いている。本研究ではNaI(Tl)結晶による観測を他実験以上の高感度で行うことで、短期間で宇宙暗黒物質の観測問題に対する解決を図る。2021年度は宇宙暗黒物質を探索するための高純度NaI結晶の作成と背景事象を感知するためのシンチレーションフィルムを組み合わせた検出器を作成した。高純度NaI結晶の作成には、これまで本研究代表者も参画するPICOLON Projectで開発された純化手法を用いた。これとシンチレーションフィルムを組み合わせたハイブリッド検出器の作成に成功した。このハイブリッド検出器のデータを取得するための高電圧電源と波形取得装置、データ集積用のパソコンを用意し、データ取得が開始できる環境を構築した。信号の分別感度向上のためには測定環境の低ノイズ化が必須であり、オシロスコープによって環境ノイズを測定し、ノイズ除去のための対策としてグラウンド結線やUPSを用いた電源系統の分離などを行った。観測環境の極低放射能化がハイブリッド検出器の性能評価や、ゆくゆくは宇宙暗黒物質探索にいても重要となる。そのためには環境をモニターし続けることにより環境の変化や汚染に素早く気づいて対策をとる必要がある。環境モニター用のロガーを用意し、温度、湿度などの基本的なデータからセンサーを用いた観測まで対応できる環境を構築した。
Development of surface contamination measurement with a scintillation film

Ikeda Haruo, SHIBUKAWA Yuna

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tohoku University

2015/04/01 - 2018/03/31

More details Close

Radioactive contamination on the large detector surface makes serious background events for observing rare physics phenomenon like neutrino less double beta decay. Its measurement has been difficult because of the detector’s structure and materials. Alpha ray detection on the surface is useful method of understanding radioactive contamination. One sided scintillation film can measure only the surface contamination of the detector and separate environmental radioactive signals from beta and gamma rays using the time structure of scintillation light.
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

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

Institution: Tohoku University

2015/04/01 - 2018/03/31

More details Close

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.
KamLAND-PICO dark matter search project

FUSHIMI KENICHI, SHIMA Tatsushi, HAZAMA Ryuuta, ORITO Reiko, INOUE Kunio, IKEDA Haruo, TAKEMOTO Yasuhiro, UMEHARA Saori, Yoshida Sei, KOZLOV Alexandre

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

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

Institution: The University of Tokushima

2012/04/01 - 2016/03/31

More details Close

We developed highly radiopure NaI(Tl) scintillator to search for dark matter. At the beginning of the research, a large amount of impurity which was as large as 1000 times of the aiming concentration was found. Consequently, we decided to focus on the purification of NaI(Tl) crystal. The material of crucible was improved and chemical processing to reduce radioactive impurities: the concentration of radioactive impurities in NaI(Tl) scintillator was successfully reduced. The final result of the concentration was, for example, about 10 μBq/kg for 226Ra. The high purity NaI(Tl) is now ready to use for dark matter search.
Real time measurement of solar CNO cycle neutrinos

INOUE Kunio, ENOMOTO Sanshiro, IKEDA Haruo

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

2007 - 2008
方向識別可能な液体シンチレーターの開発研究

池田晴雄

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 若手研究(B)

Institution: 東北大学

2006 - 2007

More details Close

電子型反ニュートリノの方向識別を液体シンチレーターで行うために本年度はリチウムを含有した液体シンチレーターの作成を行った。リチウム化合物は水溶性の物質がほとんどで、液体シンチレーターの主成分であるベンゼン環をもつような油分には溶解せず極性をもつアルコールなどにのみ少量溶解することを確認した。このリチウム含有アルコールは光の透過性については問題がなかったので、次に発光物質ジフェニルオキサゾールを溶解させ、シンチレーターとしての発光量を測定したがまったく光らないという結果が得られた。そこでリチウム化合物が水溶性であることを用い、水溶液を界面活性剤を用いて油分と混合させるという手法にとりくんだ。今回は非イオン性の界面活性剤を入手し、また水によく溶解する臭化リチウムを用いて液体シンチレーターを作成し、リチウムを目標量溶かすことが可能であると確認した。つぎに放射線源のセシウムを用いて液体シンチレーターの発光量を測定したところ目標であるカムランド実験用液体シンチレーターの発光量に対して60%ほどの光量があるという結果を得た。これは第一段階の結果としては満足できるものである。次に光の透過率を測定したが、界面活性剤の影響で大規模実験に用いるには不十分であるという結果を得、これが今後の課題である。本研究に用いた物質はすべて安価で市販されているものだけ用いて行い、それらを用いるだけでリチウム含有液体シンチレーターを作成することが可能であることが立証できた。

Show all Show first 5

Teaching Experience 2

GP-PU Experimental Course P1
Introductory Science Experiments　Tohoku University

Social Activities 3

令和７年度吉城高校理数科校内理数探究発表会

2026/01/22 - 2026/01/22
(SSH)カムランド実験

2025/08/22 - 2025/08/22
岐阜県立吉城高校理数科理数探究発表会

2024/01/26 -