Pulse shape discrimination of photons and neutrons in the energy range of 0.1 – 2 GeV with the KOTO un-doped CsI calorimeter
Journal
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Journal Volume
987
Date Issued
2021
Author(s)
Sugiyama Y.
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 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.
Subjects
Calorimeters; Cesium iodide; Neutrons; Photons; Deposited energy; Doped c-Si; Energy ranges; Output signal; Pulse shape discrimination; Scintillation light; Two photon; Germanium compounds
Type
journal article