title: Digital discrimination of neutrons and gamma-rays in organic scintillation detectors using moment analysis.
abstract: Digital discrimination of neutron and gamma-ray events in an organic scintillator has been investigated by moment analysis. Signals induced by an americium-beryllium (Am/Be) isotropic neutron source in a stilbene crystal detector have been sampled with a flash analogue-to-digital converter (ADC) of 1 GSamples/s sampling rate and 10-bit vertical resolution. Neutrons and gamma-rays have been successfully discriminated with a threshold corresponding to gamma-ray energy about 217 keV. Moment analysis has also been verified against the results assessed by a time-of-flight (TOF) measurement. It is shown that the classification of neutrons and gamma-rays afforded by moment analysis is consistent with that achieved by digital TOF measurement. This method has been applied to analyze the data acquired from the stilbene crystal detector in mixed radiation field of the HL-2A tokamak deuterium plasma discharges and the results are described.
authors.affiliation: School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: Xufei
authors.initials: X
authors.lastname: Xie
authors.forename: Xing
authors.initials: X
authors.lastname: Zhang
authors.forename: Xi
authors.initials: X
authors.lastname: Yuan
authors.forename: Jinxiang
authors.initials: J
authors.lastname: Chen
authors.forename: Xiangqing
authors.initials: X
authors.lastname: Li
authors.forename: Guohui
authors.initials: G
authors.lastname: Zhang
authors.forename: Tieshuan
authors.initials: T
authors.lastname: Fan
authors.forename: Guoliang
authors.initials: G
authors.lastname: Yuan
authors.forename: Jinwei
authors.initials: J
authors.lastname: Yang
authors.forename: Qingwei
authors.initials: Q
authors.lastname: Yang