Response of 10B+ZnS(Ag) as neutron detector in Radiation Portal Monitors

Guzmán García, Karen Arlet and Vega-Carrillo, Héctor René and Gallego Díaz, Eduardo F. and Lorente Fillol, Alfredo and González González, Juan Antonio (2017). Response of 10B+ZnS(Ag) as neutron detector in Radiation Portal Monitors. In: "14th International Congress of the International Radiation Protection Association", 9 – 13 May 2016, Cape Town South Africa. ISBN 978-0-998966-1-8. pp. 1213-1220.

Description

Title: Response of 10B+ZnS(Ag) as neutron detector in Radiation Portal Monitors
Author/s:
  • Guzmán García, Karen Arlet
  • Vega-Carrillo, Héctor René
  • Gallego Díaz, Eduardo F.
  • Lorente Fillol, Alfredo
  • González González, Juan Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: 14th International Congress of the International Radiation Protection Association
Event Dates: 9 – 13 May 2016
Event Location: Cape Town South Africa
Title of Book: Proceedings of the 14 th International Congress of the International Radiation Protection Association
Date: 2017
ISBN: 978-0-998966-1-8
Volume: 2
Subjects:
Freetext Keywords: Neutron detectors, Special Nuclear Materials SNM, Radiation Portal Monitors RPMs, 3He neutron detectors
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Energética
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Radiation Portal Monitors installed in border areas to fight illicit traffic, have the capability of detecting both gamma rays and neutrons. Neutron detection is important for homeland security to detect Special Nuclear Materials. Usually, pressurized tubes of 3He-based neutron detectors have been deployed, but this is being affected by the scarcity in 3He supplies; so alternatives to 3He for thermal neutron detection are under investigation. The aim of this work is to study the suitability of 10B+ZnS(Ag) neutron detectors, as an innovative replacement to 3He detectors. Using the MCNPX code, the response of these detectors was calculated for different geometries, varying the PMMA thicknesses. The response was estimated through the amount of 10B(n,?)7Li reactions induced by a 252Cf neutron source at 200 cm distance in two conditions: in free air and in air with ground. Results show that the closer the detector is to the ground, and the higher thickness PMMA, the greater is the efficiency. We conclude that 10B+ZnS(Ag) detectors could be considered as an alternative to the 3He detectors. Eventually, a detector is proposed with an optimized geometry able to detect around 2,5 cps per ng of 252Cf , as recommended by the ANSI Standard.

More information

Item ID: 48823
DC Identifier: http://oa.upm.es/48823/
OAI Identifier: oai:oa.upm.es:48823
Official URL: http://www.irpa.net/page.asp?id=2
Deposited by: Memoria Investigacion
Deposited on: 20 Dec 2017 19:50
Last Modified: 17 Jul 2019 14:08
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