University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Digital discrimination of neutrons and γ-rays in liquid scintillation detectors by using low sampling frequency ADCs

Nakhostin, M. (2019) Digital discrimination of neutrons and γ-rays in liquid scintillation detectors by using low sampling frequency ADCs Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 916. pp. 66-70.

[img] Text
Digital discrimination of neutrons and γ-rays in liquid scintillation detectors.docx - Accepted version Manuscript

Download (958kB)

Abstract

It is well known that the digital pulse-shape discrimination (PSD) of fast neutrons and γ-rays in liquid scintillation detectors can be adversely affected by the low sampling frequency of the analog-to-digital converter (ADC). Previous studies have recommended that using an ADC with a sampling frequency of above 250 MHz is necessary to achieve a PSD performance comparable to that of the analog PSD systems. In the present study, we show that, in principle, a sampling frequency of above 32 MHz is sufficient to fully preserve the pulse-shape information of liquid scintillation detectors, though at such sampling frequencies a significant degradation of the PSD performance may arise from the used PSD algorithm. To avoid this problem, a new PSD algorithm in the frequency domain is presented and its excellent performance at low sampling frequencies is experimentally demonstrated. At the sampling frequency of 32 MHz, a Figure-of-Merit (FOM) of 1.31±0.04 in the light output range of 200-1400 keVee (electron equivalent energy) is achieved with an ADC of 10-bit resolution.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Nakhostin, M.M.Nakhostin@surrey.ac.uk
Date : 1 February 2019
Funders : Science and Technology Facilities Council (STFC)
DOI : 10.1016/j.nima.2018.11.021
Copyright Disclaimer : © 2018. 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 : Digital Pulse-Shape Discrimination; Sampling Frequency; Analog-to-Digital Converter
Depositing User : Clive Harris
Date Deposited : 07 Nov 2018 14:55
Last Modified : 08 Nov 2019 02:08
URI: http://epubs.surrey.ac.uk/id/eprint/849834

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800