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Pulse shape discrimination of photons and neutrons in the energy range of 0.1-2 GeV with the KOTO un-doped CsI calorimeter
- Authors
- Sugiyama, Y.; Ahn, J. K.; Banno, S.; Beckford, B.; Campbell, M.; Chen, S. H.; Comfort, J.; Duh, Y. T.; Hineno, T.; Hutcheson, M.; Iwai, E.; Kamiji, I; Kawasaki, N.; Kim, E. J.; Kim, J. L.; Kim, Y. J.; Ko, J. W.; Komatsubara, T. K.; Kurilin, A. S.; Lee, J. W.; Lee, S. K.; Lim, G. Y.; Lin, C.; Lin, Q.; Luo, Y.; Ma, J.; Maeda, Y.; Masuda, T.; Matsumura, T.; Mcfarland, D.; Murayama, R.; Naito, D.; Nakagiri, K.; Nakaya, Y.; Nanjo, H.; Nomura, T.; Odani, Y.; Redeker, J. C.; Ri, Y. D.; Sasao, N.; Sato, K.; Seki, S.; Shimogawa, T.; Shinkawa, T.; Shinohara, S.; Shiomi, K.; Su, S.; Suzuki, S.; Tajima, Y.; Takahashi, G.; Takashima, Y.; Tecchio, M.; Togawa, M.; Tung, Y. C.; Wah, Y. W.; Watanabe, H.; Whallon, N.; Woo, J. K.; Xu, J.; Yamanaka, T.; Yanagida, Y.; Yoshida, H. Y.; Yoshimoto, H.
- Issue Date
- 21-1월-2021
- Publisher
- ELSEVIER
- Keywords
- Calorimeter; Pulse shape discrimination; CsI crystal; Waveform analysis; Rare kaon decay
- Citation
- NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.987
- Indexed
- SCIE
SCOPUS
- Volume
- 987
- ISSN
- 0168-9002
- Abstract
- A pulse shape difference between photons and neutrons was observed in the output signals of scintillation light from the un-doped CsI calorimeter of the KOTO experiment for the K-L -> pi(0)v (v) over bar decay. We developed a discrimination method to reject neutrons and to accept photons in the deposited energy range from 0.1 to 2 GeV. The method rejects 67% of neutron-induced single hadronic clusters and 86% of neutron-induced two cluster events while keeping more than 90% of photon-induced single electromagnetic clusters and two-photon events.
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