Study of a 10B+ZnS(Ag) neutron detector as an alternative to 3He-based detectors in Homeland Security

Guzmán-García, Karen Arlete and Vega-Carrillo, Héctor René and Gallego Díaz, Eduardo F. and Lorente Fillol, Alfredo and Méndez-Villafañe, Roberto and González, Juan A. (2016). Study of a 10B+ZnS(Ag) neutron detector as an alternative to 3He-based detectors in Homeland Security. "Applied Radiation and Isotopes", v. 117 ; pp. 58-64. ISSN 0969-8043. https://doi.org/10.1016/j.apradiso.2016.03.015.

Description

Title: Study of a 10B+ZnS(Ag) neutron detector as an alternative to 3He-based detectors in Homeland Security
Author/s:
  • Guzmán-García, Karen Arlete
  • Vega-Carrillo, Héctor René
  • Gallego Díaz, Eduardo F.
  • Lorente Fillol, Alfredo
  • Méndez-Villafañe, Roberto
  • González, Juan A.
Item Type: Article
Título de Revista/Publicación: Applied Radiation and Isotopes
Date: November 2016
ISSN: 0969-8043
Volume: 117
Subjects:
Freetext Keywords: MCNPX; Neutron detection; Special nuclear materials; Radiation portal monitors
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Energética
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The response of a scintillation neutron detector of ZnS(Ag) with 10B was calculated, using the MCNPX Monte Carlo Code. The detector consists of four panels of polymethyl methacrylate (PMMA) and five thin layers of ~0.017 cm thick 10B+ZnS(Ag) in contact with the PMMA. The response was calculated for the bare detector and with different thicknesses of High-Density Polyethylene, HDPE, moderator for 29 monoenergetic sources as well as 241AmBe and 252Cf neutrons sources. In these calculations, the reaction rate 10B(n, α)7Li and the neutron fluence in the sensitive area of the detector 10B+ZnS(Ag) was estimated. Measurements were made at the Neutron Measurements Laboratory, Universidad Politécnica de Madrid, LMN-UPM, to quantify the detections in counts per second in response to a 252Cf neutron source separated 200 cm. The MCNPX computations were compared with measurements to estimate the efficiency of ZnS(Ag) for detecting the ? that is created in the 10B(n, α)7Li reaction. After validating new models with different geometries it will be possible to improve the detector response trying to achieve a sensitivity of 2.5 cps-ng252Cf comparable with the response requirements for 3He detectors installed in the Radiation Portal Monitors, RPMs. This type of detector can be considered an alternative to the 3He detectors for detection of Special Nuclear Material, SNM.

More information

Item ID: 45496
DC Identifier: http://oa.upm.es/45496/
OAI Identifier: oai:oa.upm.es:45496
DOI: 10.1016/j.apradiso.2016.03.015
Official URL: http://www.sciencedirect.com/science/article/pii/S0969804316300999
Deposited by: Memoria Investigacion
Deposited on: 26 Apr 2017 17:58
Last Modified: 01 Dec 2018 23:30
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