Details of the Researcher

PHOTO

Kazumi Hata
Section
Research Center for Neutrino Science
Job title
Specially Appointed Assistant Professor(Research)
Degree

  • Doctor(Science) (Tohoku University)

e-Rad No.
20981632

Research History 1

  • 2023/04 - Present
    Tohoku University　Research Center for Neutrino Science

Education 3

  • Tohoku University　Graduate School of Science　Department of Physics

    2020/04 - 2023/03

  • The University of Tokushima　Graduate School of Integrated Arts and Sciences

    2018/04 - 2020/03

  • The University of Tokushima　Faculty of Integrated Arts and Sciences　Department of Mathematical and Material Sciences

    2014/04 - 2018/03

Professional Memberships 2

  • 高エネルギー物理学研究者会議

  • 日本物理学会

Research Interests 3

  • 二重ベータ崩壊

  • ニュートリノ

  • 暗黒物質

Research Areas 1

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

Awards 6

  1. BEST POSTER AWARD

    2024/03　Unraveling the History of the Universe and Matter Evolution with Underground Physics

  2. 東北大学理学研究科合同シンポジウム2022優秀口頭発表賞

    2022/03　KamLANDにおける宇宙暗黒物質探索

  3. TAUP2019 POSTER HONOURABLE MENTION

    2019/09　16th International Conference on Topics in Astroparticle and Underground Physics　A neutron response evaluation of NaI(Tl) scintillator for dark matter search

  4. POSTER AWARD

    2019/03　Revealing the history of the universe with underground particle and nuclear research 2019　A neutron response evaluation of NaI(Tl) scintillator for exploration of the universe dark matter

  5. 渭水会会長賞

    2018/03　徳島大学

  6. ポスター最優秀賞

    2017/11　SMART2017:Scintillator forMedical、Astroparticle and environmental Radiation Technologies　宇宙暗黒物質探索のためのNaI(Tl)検出器の中性子応答評価

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Papers 28

  1. New physics opportunities at neutrino facilities: BSM physics at accelerator, atmospheric, and reactor neutrino experiments

    Koun Choi, Doojin Kim, Jong-Chul Park, Seodong Shin, Pouya Bakhti, Ki-Young Choi, Chang Hyon Ha, Kazumi Hata, Wooyoung Jang, Yu Seon Jeong, Young Ju Ko, Hyun Su Lee, Weijun Li, Yu-Feng Li, Mehedi Masud, Kenny C Y Ng, Jungsic Park, Min-Gwa Park, Komninos-John Plows, Meshkat Rajaee, Eunil Won, Byeongsu Yang, Seong Moon Yoo, Jaehoon Yu, Seokhoon Yun

    Reports on Progress in Physics　2026/08/01

    DOI： 10.1088/1361-6633/ae916b 　

  2. Search for Majorana Neutrinos with the Complete KamLAND-Zen Dataset

    S. Abe, T. Araki, K. Chiba, T. Eda, M. Eizuka, Y. Funahashi, A. Furuto, 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, 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. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, 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

    Physical Review Letters　135　(26)　2025/12/29

    Publisher: American Physical Society (APS)

    DOI： 10.1103/jkf6-48j8 　

    ISSN： 0031-9007

    eISSN： 1079-7114

    More details Close

    We present a search for neutrinoless double-beta ( 0 ν β β ) decay of Xe 136 using the full KamLAND-Zen 800 dataset with 745 kg of enriched xenon, corresponding to an exposure of 2.1 ton yr of Xe 136 . This updated search benefits from a more than twofold increase in exposure, recovery of photo-sensor gain, and reduced background from muon-induced spallation of xenon. Combining with the search in the previous KamLAND-Zen phase, we obtain a lower limit for the 0 ν β β decay halflife of T 1 / 2 0 ν > 3.8 × 10 26     yr at 90% CL, a factor of 1.7 improvement over the previous limit. The corresponding upper limits on the effective Majorana neutrino mass are in the range 28–122 meV using phenomenological nuclear matrix element calculations.

  3. 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　2025/11/29

    DOI： 10.1093/ptep/ptaf160 　

  4. 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, Penek, H. Song, A. Li, S. N. Axani, M. Garcia, M. Sarfraz

    Astrophysical Journal　981　(2)　2025/03/10

    DOI： 10.3847/1538-4357/ad9c36 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  5. Combined Pre-supernova Alert System with KamLAND and Super-Kamiokande

    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.

  6. 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

  7. Quenching factor measurement of low-energy Na recoils in ultra-pure NaI(Tl) crystal Peer-reviewed

    Yusuke Urano, Ken-Ichi Fushimi, Kazumi Hata, Yohei Kawai, Satoshi Konishi, Kenta Kotera, Shunsuke Kurosawa, Keisuke Mukai, Yasuyuki Ogino, Reiko Orito, Toshiro Sakabe

    Proceedings of XVIII International Conference on Topics in Astroparticle and Underground Physics — PoS(TAUP2023)　087-087　2024/02/09

    Publisher: Sissa Medialab

    DOI： 10.22323/1.441.0087 　

  8. 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 　

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

    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

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

    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

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

    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

  12. 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.

  13. 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

  14. 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)　2022/08/11

    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.

  15. 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

    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.

  16. 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　2022/03/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac4e7e 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  17. 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　2022/01/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac35d1 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  18. 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　2022/01/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac32c1 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  19. Quenching factor measurement of NaI (Tl) using monochromatic neutrons for dark matter search Peer-reviewed

    RADIATION DETECTORS AND THEIR USES Proceedings of the 35th Workshop on Radiation Detectors and Their Uses　53-61　2021/12

  20. 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.

  21. 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

  22. 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 　

  23. Development of highly radiopure NaI(Tl) scintillator for PICOLON dark matter search project Peer-reviewed

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

    Progress of Theoretical and Experimental Physics　2021　(4)　2021/04/19

    Publisher: Oxford University Press (OUP)

    DOI： 10.1093/ptep/ptab020 　

    eISSN： 2050-3911

  24. 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

  25. PICOLON dark matter search ∼ Development of highly redio-pure NaI(Tl) scintilltor

    Ken Ichi Fushimi, Dmitry Chernyak, Hiroyasu Ejiri, Kazumi Hata, Ryuta Hazama, Shoko Hirata, Takashi Iida, Haruo Ikeda, Kunio Inoue, Kyoshiro Imagawa, Yuta Kanemitsu, Alexandle Kozlov, Reiko Orito, Tatsushi Shima, Yasuhiro Takemoto, Saori Umehara, Sei Yoshida

    Journal of Physics: Conference Series　1468　(1)　2020/03/20

    DOI： 10.1088/1742-6596/1468/1/012057 　

    ISSN： 1742-6588

    eISSN： 1742-6596

  26. Purification of the NaI(Tl) crystal for dark matter search project PICOLON

    Y. Kanemitsu, D. Chernyak, H. Ejiri, K. Fushimi, K. Hata, R. Hazama, H. Ikeda, K. Imagawa, K. Inoue, A. Kozlov, R. Orito, T. Shima, Y. Takemoto, S. Umehara, K. Yasuda, S. Yoshida

    Journal of Physics: Conference Series　1468　(1)　2020/03/20

    DOI： 10.1088/1742-6596/1468/1/012054 　

    ISSN： 1742-6588

    eISSN： 1742-6596

  27. Measurement of the scintillation response of neutron scattering in NaI(Tl) scintillator for dark matter search Peer-reviewed

    Kazumi Hata, Choi Eunjoo, Ken-Ichi Fushimi, Reiko Orito

    Proceedings of the 33rd Workshop on Radiation Detectors and Their Uses　69-76　2019/12

  28. Dark Matter Search by Means of Highly Radiopure NaI(Tl) Scintillator Peer-reviewed

    Ken-Ichi Fushimi, Dmitry Chernyak, Hiroyasu Ejiri, Kazumi Hata, Ryuta Hazama, Shoko Hirata, Haruo Ikeda, Kyoshiro Imagawa, Kunio Inoue, Alexandre Kozlov, Reiko Orito, Tatsushi Shima, Yasuhiro Takemoto, Saori Umehara, Kensuke Yasuda, Sei Yoshida

    Proceedings of the Second International Symposium on Radiation Detectors and Their Uses (ISRD2018)　2019/01/22

    Publisher: Journal of the Physical Society of Japan

    DOI： 10.7566/jpscp.24.011011 　

Show all ︎Show first 5

Misc. 11

  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. PICOLON dark matter search: Quenching factor measurement of NaI (Tl) using monochromatic neutrons: 2

    浦野雄介, 川合洋平, 伏見賢一, 畑和実, 小西哲之, 黒澤俊介, 向井啓祐, 荻野靖之, 折戸玲子, 坂部俊郎

    日本物理学会講演概要集(CD-ROM)　77　(2)　2022

    ISSN： 2189-079X

  8. 宇宙暗黒物質探索用NaI(Tl)シンチレータの消光因子測定のための単色中性子ビーム照射シミュレーション

    浦野雄介, 畑和実, 折戸玲子, 伏見賢一

    放射線(Web)　47　(3)　2022

    ISSN： 2758-9064

  9. 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

  10. 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

  11. PICOLON dark matter search: Quenching factor measurement of NaI(Tl) using monochromatic neutrons

    浦野雄介, 畑和実, 折戸玲子, 黒澤俊介, 伏見賢一, 小西哲之, MAHMOUD Bakr, 向井啓祐

    日本物理学会講演概要集(CD-ROM)　76　(1)　2021

    ISSN： 2189-079X

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Presentations 11

  1. Latest results and prospects on neutrinoless double beta decay from KamLAND-Zen Invited

    Kazumi Hata

    Neutrino Physics Conference in Vietnam 2025　2025/07/23

  2. Geoneutrino measurement with KamLAND Invited

    Kazumi Hata

    Neutrino Physics Conference in Vietnam 2025　2025/07/22

  3. Neutrinoless double beta decay search and dark matter search with KamLAND-Zen

    Kazumi Hata

    International Conference on Neutrinos and Dark Matter (NuDM-2024)　2024/12/13

  4. KamLAND-Zen：背景事象の評価

    畑 和実 他KamLAND-Zen collaboration

    日本物理学会 第79回年次大会 (2024)　2024/09/18

  5. BSM search in KamLAND Invited

    The 4th Workshop on New Physics Opportunities at Neutrino Facilities　2024/06/04

  6. KamLAND-ZenによるWIMP暗黒物質の荷電励起状態の初探索

    畑 和実, 他KamLAND-Zen collaboration

    日本物理学会 第78回年次大会(2023)　2023/09/18

  7. Search for DM self-annihilation to neutrino production in KamLAND

    Kazumi Hata

    Workshop on Very Light Dark Matter 2021　2021/09/29

  8. KamLANDを用いた宇宙線によって加速された暗黒物質の探索

    畑 和実, 他KamLAND collaboration

    日本物理学会2021年秋季大会　2021/09/14

  9. KamLANDを用いた宇宙線によって加速された暗黒物質の探索

    畑 和実, 他KamLAND collaboration

    日本物理学会第76回年次大会(2021年)　2021/03

  10. PICOLON報告:宇宙暗黒物質探索のためのNaI(Tl)シンチレータの中性子応答評価

    畑 和実

    日本物理学会第75回年次大会(2020年)　2020/03

  11. PICOLON報告:宇宙暗黒物質探索のためのNaI(Tl)シンチレータの中性子応答評価

    畑 和実

    日本物理学会2019年秋季大会　2019/09

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Research Projects 1

  1. 次世代宇宙素粒子実験に向けた有機物材料中の極微量放射性元素の高感度測定および低減技術の確立

    畑 和実, 市村 晃一, 岸本 康宏, 蜂谷 尊彦, 細川 佳志, 三宅 春彦, 佐々木 息吹, 坂口 綾, 高久 雄一

    Offer Organization: 筑波大学

    System: 放射能環境動態・影響評価ネットワーク共同研究拠点（ERAN）

    Category: 若手課題共同研究

    2026/04 - 2027/03

Social Activities 1

  1. インタラクション2024夏

    カミオカラボ発行情報誌

    2024/07/21 -