Author:
Roy A.,Vartsky D.,Mor I.,O. Cohen E.,Yehuda-Zada Y.,Beck A.,Arazi L.
Abstract
Abstract
The use of Time-over-Threshold (TOT) for the discrimination
between fast neutrons and gamma-rays is advantageous when large
number of detection channels are required due to the simplicity of
its implementation. However, the results obtained using the
standard, Constant Threshold TOT (CT-TOT) are usually inferior to
those obtained using other pulse shape discrimination (PSD) methods,
such as Charge Comparison or Zero-Crossing approaches, especially
for low amplitude neutron/gamma-ray pulses. We evaluate another TOT
approach for fast neutron/gamma-ray PSD using Constant-Fraction
Time-over-Threshold (CF-TOT) pulse shape analysis. The CT-TOT and
CF-TOT methods were compared quantitatively using digitized
waveforms from a liquid scintillator coupled to a photomultiplier
tube as well as from a stilbene scintillator coupled to a
photomultiplier tube and a silicon photomultiplier. The quality of
CF-TOT neutron/gamma-ray discrimination was evaluated using Receiver
Operator Characteristics curves and the results obtained with this
approach were compared to that of the standard CT-TOT method. The
CF-TOT PSD method results in > 99.9% rejection of gamma-rays with
> 80% neutron acceptance, much better than CT-TOT.
Subject
Mathematical Physics,Instrumentation
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. Generalized method for the optimization of pulse shape discrimination parameters;Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment;2023-05
2. Optimization and first electronic implementation of the Constant-Fraction Time-Over-Threshold pulse shape discrimination method;Journal of Instrumentation;2023-05-01
3. Demonstration of fast multiplicity counting of 252Cf using plastic scintillators and silicon photomultipliers;Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment;2022-10