A comparison of digital zero-crossing and charge-comparison methods for neutron/γ-ray discrimination with liquid scintillation detectors

Nakhostin, Mohammad (2015) A comparison of digital zero-crossing and charge-comparison methods for neutron/γ-ray discrimination with liquid scintillation detectors Nuclear Instruments and Methods in Physics Research A, 797. pp. 77-82.

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Abstract

In this paper,we have compared the performances of the digital zero-crossing and charge-comparison methods forn/γ discrimination with liquid scintillation detectors at low light outputs. The measurements were performed with a 2″ x 2″ cylindrical liquid scintillation detector of type BC501A whose outputs were sampled by means of a fast wave form digitizer with 10-bit resolution,4G S/s sampling rate and one volt input range. Different light output ranges were measured by operating the photomultiplier tube at different voltages and a new recursive algorithm was developed to implement the digital zero- crossing method.The results of our study demonstrate the superior performance of the digital zero- crossing method at low light outputs when a large dynamic range is measured.However,when the input range of the digitizer is used to measure a narrow range of light outputs, the charge-comparison method slightly outperforms the zero-crossing method. The results are discussed in regard to the effects of the quantization noise and the noise filtration performance of the zero-crossing filter. slightly outperforms the zero-crossing method. The results are discussed in regard to the effects of the quantization noise and the noise filtration performance of the zero-crossing filter.

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Physics
Authors :	Name Email ORCID Nakhostin, Mohammad M.Nakhostin@surrey.ac.uk
Date :	2 July 2015
DOI :	10.1016/j.nima.2015.06.041
Copyright Disclaimer :	© 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords :	Pulse-shape discrimination; Liquid scintillation detectors; Zero-crossing method
Depositing User :	Melanie Hughes
Date Deposited :	08 Sep 2017 09:24
Last Modified :	16 Jan 2019 18:56
URI:	http://epubs.surrey.ac.uk/id/eprint/842215

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