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First study of neutron tagging with a water Cherenkov detector

  • H. Watanabe
  • , H. Zhang
  • , K. Abe
  • , Y. Hayato
  • , T. Iida
  • , M. Ikeda
  • , J. Kameda
  • , K. Kobayashi
  • , Y. Koshio
  • , M. Miura
  • , S. Moriyama
  • , M. Nakahata
  • , S. Nakayama
  • , Y. Obayashi
  • , H. Ogawa
  • , H. Sekiya
  • , M. Shiozawa
  • , Y. Suzuki
  • , A. Takeda
  • , Y. Takenaga
  • Y. Takeuchi, K. Ueno, K. Ueshima, S. Yamada, S. Hazama, I. Higuchi, C. Ishihara, T. Kajita, K. Kaneyuki, G. Mitsuka, H. Nishino, K. Okumura, N. Tanimoto, S. Clark, S. Desai, F. Dufour, E. Kearns, S. Likhoded, M. Litos, J. Raaf, J. L. Stone, L. R. Sulak, W. Wang, M. Goldhaber, K. Bays, D. Casper, J. P. Cravens, J. Dunmore, J. Griskevich, W. R. Kropp, D. W. Liu, S. Mine, C. Regis, M. B. Smy, H. W. Sobel, K. S. Ganezer, J. Hill, W. E. Keig, J. S. Jang, I. S. Jeong, J. Y. Kim, I. T. Lim, M. Fechner, K. Scholberg, C. W. Walter, R. Wendel, S. Tasaka, G. Guillian, J. G. Learned, S. Matsuno, M. D. Messier, Y. Watanabe, T. Hasegawa, T. Ishida, T. Ishii, T. Kobayashi, T. Nakadaira, K. Nakamura, K. Nishikawa, Y. Oyama, K. Sakashita, T. Sekiguchi, T. Tsukamoto, A. T. Suzuki, A. K. Ichikawa, A. Minamino, T. Nakaya, M. Yokoyama, T. J. Haines, S. Dazeley, R. Svoboda, R. Gran, A. Habig, Y. Fukuda, Y. Itow, T. Tanaka, C. K. Jung, C. McGrew, A. Sarrat, R. Terri, C. Yanagisawa, N. Tamura, Y. Idehara, H. Ishino, A. Kibayashi, M. Sakuda, Y. Kuno, M. Yoshida, S. B. Kim, B. S. Yang, T. Ishizuka, H. Okazawa, Y. Choi, H. K. Seo, Y. Furuse, K. Nishijima, Y. Yokosawa, M. Koshiba, Y. Totsuka, M. R. Vagins, S. Chen, Z. Deng, G. Gong, Y. Liu, T. Xue, D. Kielczewska, H. G. Berns, K. K. Shiraishi, E. Thrane, R. J. Wilkes
  • The University of Tokyo
  • Tsinghua University
  • Boston University
  • Brookhaven National Laboratory
  • University of California at Irvine
  • California State University Dominguez Hills
  • Chonnam National University
  • Duke University
  • Gifu University
  • University of Hawai'i at Mānoa
  • Indiana University Bloomington
  • Kanagawa University
  • High Energy Accelerator Research Organization, Tsukuba
  • Kobe University
  • Kyoto University
  • Los Alamos National Laboratory
  • Louisiana State University
  • University of Minnesota Duluth
  • Miyagi University of Education
  • Nagoya University
  • Stony Brook University
  • Niigata University
  • Okayama University
  • The University of Osaka
  • Seoul National University
  • Shizuoka University
  • Shizuoka University of Welfare
  • Sungkyunkwan University
  • Tokai University
  • University of Warsaw
  • University of Washington

Research output: Contribution to journalArticlepeer-review

97 Scopus citations

Abstract

A first study of neutron tagging is conducted in Super-Kamiokande, a 50,000 ton water Cherenkov detector. The tagging efficiencies of thermal neutrons are evaluated in a 0.2% GdCl3-water solution and pure water. They are determined to be, respectively, 66.7% for events above 3 MeV and 20% with corresponding background probabilities of 2 × 10- 4 and 3 × 10- 2. This newly developed technique may enable water Cherenkov detectors to identify over(ν, ̄)e's from astrophysical sources as well as those produced by commercial reactors via the delayed coincidence scheme.

Original languageEnglish
Pages (from-to)320-328
Number of pages9
JournalAstroparticle Physics
Volume31
Issue number4
DOIs
StatePublished - May 2009

Keywords

  • Gadolinium
  • Neutron tagging
  • Water Cherenkov detector

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