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

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:
; ; ; ; ; ;  [1] ; ; ;  [2]
  1. School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing (China)
  2. Southwestern Institute of Physics, Chengdu (China)
Publication Date:
OSTI Identifier:
22093736
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 83; Journal Issue: 9; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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