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Characterisation of an isotropic neutron source: a comparison of conventional neutron detectors and micro-silica glass bead thermoluminescent detectors

Abubakar, YM, Taggart, Matthew, Alsubaie, Abdullah, Alanazi, Abdulaziz, Alyahyawi, Amjad, Lohstroh, Annika, Shutt, A, Jafari, Shakardokht and Bradley, David (2016) Characterisation of an isotropic neutron source: a comparison of conventional neutron detectors and micro-silica glass bead thermoluminescent detectors Radiation Physics and Chemistry.

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Abstract

As a result of their thermoluminescent response, low cost commercial glass beads have been demonstrated to offer potential use as radiation dosimeters, providing capability in sensing different types of ionising radiation. With a linear response over a large range of dose and spatial resolution that allows measurements down to the order of 1 mm, their performance renders them of interest in situations in which sensitivity, dynamic range, and fine spatial resolution are called for. In the present work, the suitability of glass beads for characterisation of an AmericiumBeryllium (241AmBe) neutron source has been assessed. Direct comparison has been made using conventional 3He and boron tri-fluoride neutron detectors as well as Monte Carlo simulation. Good agreement is obtained between the glass beads and gas detectors in terms of general reduction of count rate with distance. Furthermore, the glass beads demonstrate exceptional spatial resolution, leading to the observation of fine detail in the plot of dose versus distance from source. Fine resolution peaks arising in the measured plots, also present in simulations, are interesting features which based on our best knowledge have previously not been reported. The features are reproduced in both experiment and simulation but we do not have a firm reason for their origin. Of greater clarity is that the glass beads have considerable potential for use in high spatial resolution neutron field characterisation, subject to the availability of a suitable automated TLD reader.

Item Type: Article
Subjects : Physics
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Abubakar, YMUNSPECIFIEDUNSPECIFIED
Taggart, Matthewm.taggart@surrey.ac.ukUNSPECIFIED
Alsubaie, Abdullaha.alsubaie@surrey.ac.ukUNSPECIFIED
Alanazi, Abdulaziza.alanazi@surrey.ac.ukUNSPECIFIED
Alyahyawi, Amjada.alyahyawi@surrey.ac.ukUNSPECIFIED
Lohstroh, AnnikaA.Lohstroh@surrey.ac.ukUNSPECIFIED
Shutt, AUNSPECIFIEDUNSPECIFIED
Jafari, Shakardokhts.jafari@surrey.ac.ukUNSPECIFIED
Bradley, DavidD.A.Bradley@surrey.ac.ukUNSPECIFIED
Date : 1 December 2016
Identification Number : 10.1016/j.radphyschem.2016.11.015
Copyright Disclaimer : © 2016. 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 : neutron detection, glass bead TLD, thermoluminescence, 3He, boron tri-fluoride
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 09 Dec 2016 11:39
Last Modified : 22 Aug 2017 17:38
URI: http://epubs.surrey.ac.uk/id/eprint/813078

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