Neutron–gamma discrimination based on pulse shape discrimination in a Ce:LiCaAlF6 scintillator

✍ Scribed by Atsushi Yamazaki; Kenichi Watanabe; Akira Uritani; Tetsuo Iguchi; Noriaki Kawaguchi; Takayuki Yanagida; Yutaka Fujimoto; Yuui Yokota; Kei Kamada; Kentaro Fukuda; Toshihisa Suyama; Akira Yoshikawa

• Book ID: 113822043
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 597 KB
• Volume: 652
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2011.02.064

✦ Synopsis

We demonstrate neutron-gamma discrimination based on a pulse shape discrimination method in a Ce:LiCAF scintillator. We have tried neutron-gamma discrimination using a difference in the pulse shape or the decay time of the scintillation light pulse. The decay time is converted into the rise time through an integrating circuit. A 252 Cf enclosed in a polyethylene container is used as the source of thermal neutrons and prompt gamma-rays. Obvious separation of neutron and gamma-ray events is achieved using the information of the rise time of the scintillation light pulse. In the separated neutron spectrum, the gamma-ray events are effectively suppressed with little loss of neutron events. The pulse shape discrimination is confirmed to be useful to detect neutrons with the Ce:LiCAF scintillator under an intense high-energy gamma-ray condition.