10B+ZnS(Ag)as an alternative to 3He-based detectors for Radiation Portal Monitors

Guzmán García, Karen Arlet and Vega-Carrillo, Héctor René and Gallego Díaz, Eduardo F. and González González, Juan Antonio and Lorente Fillol, Alfredo and Ibáñez-Fernández, Sviatoslav (2017). 10B+ZnS(Ag)as an alternative to 3He-based detectors for Radiation Portal Monitors. "EPJ Web of Conferences", v. 153 (n. 07008); pp. 1-6. ISSN 2100-014X. https://doi.org/10.1051/epjconf/201715307008.

Description

Title: 10B+ZnS(Ag)as an alternative to 3He-based detectors for Radiation Portal Monitors
Author/s:
  • Guzmán García, Karen Arlet
  • Vega-Carrillo, Héctor René
  • Gallego Díaz, Eduardo F.
  • González González, Juan Antonio
  • Lorente Fillol, Alfredo
  • Ibáñez-Fernández, Sviatoslav
Item Type: Article
Título de Revista/Publicación: EPJ Web of Conferences
Date: 2017
ISSN: 2100-014X
Volume: 153
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Energética
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Typical radiation portal monitor systems, RPM, deployed to detect illicit trafficking of radioactive materials include a set of gamma-ray detectors and neutron detectors. Usually the employed neutron detectors are pressurized 3 He-based neutron detectors tubes. Due the shortage of 3 He reported since 2009, the amount of 3 He available for use in gas proportional counter neutron detectors has become limited, while the demand has significantly increased, especially for homeland security applications. For this reason, many different alternatives are being investigated for its use in RPM systems. The aim of this work is to study a scintillation detector ZnS(Ag) mixed with highly enriched 10B, 10B+ZnS(Ag). Using Monte Carlo methods, MCNPX code, the response of two neutron detectors based on 10B+ZnS(Ag), manufactured by BridgePort Instruments LLC with different geometries, were estimated by calculating the number of 10B(n,α) 7 Li reactions for 29 monoenergetic neutron sources. Measurements and models were made, and both detectors were compared. The importance of the distance with respect to the ground was studied. The response with a 252Cf moderated neutron source (0.5 cm lead and 2.5 cm polyethylene) was calculated in order to compare with other studied alternatives in the USA by Pacific National Northwest Laboratory, PNNL. With these results we conclude that neutron detectors using 10B+ZnS(Ag) are an interesting alternative for replacing 3 He detectors. From the analysis with MCNPX we propose an improvement in the detector design.

More information

Item ID: 50084
DC Identifier: http://oa.upm.es/50084/
OAI Identifier: oai:oa.upm.es:50084
DOI: 10.1051/epjconf/201715307008
Official URL: https://www.epj-conferences.org/articles/epjconf/abs/2017/22/epjconf_icrs2017_07008/epjconf_icrs2017_07008.html
Deposited by: Memoria Investigacion
Deposited on: 20 Jun 2018 15:07
Last Modified: 17 Jul 2019 14:04
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