A method to calibrate the n-γ discrimination property of scintillators in low energy region. (January 2021)

• Record Type: Journal Article
• Authors: Bai, Huaiyong; Zhang, Guohui; Xiong, Zhonghua; Li, Yongming; Zhao, Deshan; Su, Ming; Mo, Zhaohong; Wang, Xiaodong; Gao, Fan; Zhang, Hongjun; Zhang, Zhenyu; Wen, Ji
• Is Part Of: Applied radiation and isotopes. Volume 167(2021)
• Publication Date: 2021-01
• Subjects: Scintillators -- n-γ discrimination -- Time-of-flight; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2020.109447
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: Scintillators with n - γ discrimination property are widely used in the measurement of neutrons. In sub MeV region, the n - γ discrimination property will be greatly deteriorated so that the neutron and γ -ray events can't be accurately discriminated. As a result, the determination of the proportions of neutron and γ -ray events beyond the discrimination threshold is important if scintillators are applied to measure the low energy neutrons. In the present work, a method based on the time-of-flight technique is proposed to calibrate the proportions of neutron and γ -ray events beyond the discrimination threshold. After the calibration, the numbers of the measured neutron and γ -ray events can be separately determined even if the neutron and γ -ray events can't be perfectly discriminated. Highlights: A method was proposed to calibrate the proportions of neutron and γ-ray events beyond the discrimination threshold. The numbers of the neutron and γ-ray events can be separately determined even if they can't be accurately classified. After the calibration, a lower detection threshold can be adopted to improve the detection efficiency of the scintillators.