Pulse shape discrimination of photons and neutrons in the energy range of 0.1 – 2 GeV with the KOTO un-doped CsI calorimeter

Sugiyama Y.YEE HSIUNG et al.2021-07-282021-07-2820211689002https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096177904&doi=10.1016%2fj.nima.2020.164825&partnerID=40&md5=c8c1f378b39971b9db7d6b80e9b9a3achttps://scholars.lib.ntu.edu.tw/handle/123456789/575144A 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 KL→π0νν? 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. ? 2020 Elsevier B.V.Calorimeters; Cesium iodide; Neutrons; Photons; Deposited energy; Doped c-Si; Energy ranges; Output signal; Pulse shape discrimination; Scintillation light; Two photon; Germanium compounds[SDGs]SDG16Pulse shape discrimination of photons and neutrons in the energy range of 0.1 – 2 GeV with the KOTO un-doped CsI calorimeterjournal article10.1016/j.nima.2020.1648252-s2.0-85096177904