First study of neutron tagging with a water Cherenkov detector
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. © 2009 Elsevier B.V.
Watanabe, H; Zhang, H; Abe, K; Hayato, Y; Iida, T; Ikeda, M; Kameda, J; Kobayashi, K; Koshio, Y; Miura, M; Moriyama, S; Nakahata, M; Nakayama, S; Obayashi, Y; Ogawa, H; Sekiya, H; Shiozawa, M; Suzuki, Y; Takeda, A; Takenaga, Y; Takeuchi, Y; Ueno, K; Ueshima, K; Yamada, S; Hazama, S; Higuchi, I; Ishihara, C; Kajita, T; Kaneyuki, K; Mitsuka, G; Nishino, H; Okumura, K; Tanimoto, N; Clark, S; Desai, S; Dufour, F; Kearns, E; Likhoded, S; Litos, M; Raaf, J; Stone, JL; Sulak, LR; Wang, W; Goldhaber, M; Bays, K; Casper, D; Cravens, JP; Dunmore, J; Griskevich, J; Kropp, WR; Liu, DW; Mine, S; Regis, C; Smy, MB; Sobel, HW; Ganezer, KS; Hill, J; Keig, WE; Jang, JS; Jeong, IS; Kim, JY; Lim, IT; Fechner, M; Scholberg, K; Walter, CW; Wendel, R; Tasaka, S; Guillian, G; Learned, JG; Matsuno, S; Messier, MD; Watanabe, Y; Hasegawa, T; Ishida, T; Ishii, T; Kobayashi, T; Nakadaira, T; Nakamura, K; Nishikawa, K; Oyama, Y; Sakashita, K; Sekiguchi, T; Tsukamoto, T; Suzuki, AT; Ichikawa, AK; Minamino, A; Nakaya, T; Yokoyama, M; Haines, TJ; Dazeley, S; Svoboda, R; Gran, R; Habig, A; Fukuda, Y; Itow, Y; Tanaka, T; Jung, CK; McGrew, C; Sarrat, A; Terri, R
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