Digital discrimination of neutrons and gamma-rays in organic scintillation detectors using moment analysis

Journal Article · Sat Sep 15 04:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4754633· OSTI ID:22093736

Xufei, Xie; Xing, Zhang; Xi, Yuan; Jinxiang, Chen; Xiangqing, Li; Guohui, Zhang; Tieshuan, Fan ^[1]; Guoliang, Yuan; Jinwei, Yang; Qingwei, Yang ^[2]

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1. School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing (China)
2. Southwestern Institute of Physics, Chengdu (China)

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.

• OSTI ID: 22093736
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 83; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AMERICIUM
ANALOG-TO-DIGITAL CONVERTERS
BERYLLIUM
CLASSIFICATION
CRYSTALS
DEUTERIUM
GAMMA DETECTION
GAMMA RADIATION
HL-2A TOKAMAK
KEV RANGE 100-1000
NEUTRON DETECTION
NEUTRON SOURCES
NEUTRONS
PARTICLE DISCRIMINATION
PLASMA
PLASTIC SCINTILLATION DETECTORS
RESOLUTION
SOLID SCINTILLATION DETECTORS
STILBENE
TIME-OF-FLIGHT METHOD