TY - JOUR
T1 - Neutron tagging following atmospheric neutrino events in a water Cherenkov detector
AU - THE SUPER-KAMIOKANDE COLLABORATION
AU - Abe, K.
AU - Haga, Y.
AU - Hayato, Y.
AU - Hiraide, K.
AU - Ieki, K.
AU - Ikeda, M.
AU - Imaizumi, S.
AU - Iyogi, K.
AU - Kameda, J.
AU - Kanemura, Y.
AU - Kataoka, Y.
AU - Kato, Y.
AU - Kishimoto, Y.
AU - Miki, S.
AU - Mine, S.
AU - Miura, M.
AU - Mochizuki, T.
AU - Moriyama, S.
AU - Nagao, Y.
AU - Nakahata, M.
AU - Nakajima, T.
AU - Nakano, Y.
AU - Nakayama, S.
AU - Okada, T.
AU - Okamoto, K.
AU - Orii, A.
AU - Sato, K.
AU - Sekiya, H.
AU - Shiozawa, M.
AU - Sonoda, Y.
AU - Suzuki, Y.
AU - Takeda, A.
AU - Takemoto, Y.
AU - Takenaka, A.
AU - Tanaka, H.
AU - Tasaka, S.
AU - Tomura, T.
AU - Ueno, K.
AU - Watanabe, S.
AU - Yano, T.
AU - Yokozawa, T.
AU - Han, S.
AU - Irvine, T.
AU - Kajita, T.
AU - Kametani, I.
AU - Kaneyuki, K.
AU - Hiraki, T.
AU - Ishino, H.
AU - Ito, Shintaro
AU - Koshio, Y.
N1 - Publisher Copyright:
© 2022 The Author(s)
PY - 2022/10/1
Y1 - 2022/10/1
N2 - We present the development of neutron-tagging techniques in Super-Kamiokande IV using a neural network analysis. The detection efficiency of neutron capture on hydrogen is estimated to be 26%, with a mis-tag rate of 0.016 per neutrino event. The uncertainty of the tagging efficiency is estimated to be 9.0%. Measurement of the tagging efficiency with data from an Americium-Beryllium calibration agrees with this value within 10%. The tagging procedure was performed on 3,244.4 days of SK-IV atmospheric neutrino data, identifying 18,091 neutrons in 26,473 neutrino events. The fitted neutron capture lifetime was measured as 218±9 μs.
AB - We present the development of neutron-tagging techniques in Super-Kamiokande IV using a neural network analysis. The detection efficiency of neutron capture on hydrogen is estimated to be 26%, with a mis-tag rate of 0.016 per neutrino event. The uncertainty of the tagging efficiency is estimated to be 9.0%. Measurement of the tagging efficiency with data from an Americium-Beryllium calibration agrees with this value within 10%. The tagging procedure was performed on 3,244.4 days of SK-IV atmospheric neutrino data, identifying 18,091 neutrons in 26,473 neutrino events. The fitted neutron capture lifetime was measured as 218±9 μs.
KW - Cherenkov detectors
KW - Large detector systems for particle and astroparticle physics
KW - Neutrino detectors
KW - Particle identification methods
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U2 - 10.1088/1748-0221/17/10/P10029
DO - 10.1088/1748-0221/17/10/P10029
M3 - Article
AN - SCOPUS:85141030968
SN - 1748-0221
VL - 17
JO - Journal of Instrumentation
JF - Journal of Instrumentation
IS - 10
M1 - P10029
ER -