Development of a modular mixed-radiation directional rotating scatter mask detection system

Authors

Bryan V. Egner, Air Force Institute of Technology
Darren E. Holland, Air Force Institute of TechnologyFollow
Larry W. Burggraf, Air Force Institute of TechnologyFollow
James E. Bevins, Air Force Institute of Technology

Document Type

Article

Publication Date

1-21-2021

Abstract

The ability to simultaneously identify the direction of both fast neutrons, above 1 MeV, and gamma rays using a light-weight system consisting of a single 1” EJ-309 organic liquid scintillator and a plastic Spartan rotating scatter mask (RSM) is demonstrated computationally through Monte Carlo simulations and validated with experimental measurements. Two sets of directional measurements were performed with an americium–beryllium source, emitting both neutrons and gamma rays. The RSM identified the direction of the source within one 10° rotational increment in the azimuthal and polar directions based on both the neutron and gamma-ray induced signals discriminated by charge integration pulse-shape discrimination. These results indicate the RSM system is a compact, light-weight, and modular directional detection system useful for rapid identification of the type and direction of radioactive sources, a desirable feature for many nuclear security and safety applications.

Comments

AFIT Scholar furnishes the accepted manuscript version (2 November 2020) of this article, as sourced from the publisher. The accepted manuscript is shared on AFIT Scholar in accordance with an embargo period that expired 09 November 2021.

© 2021 published by Elsevier. This manuscript is made available under the Elsevier user license.

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Shared on AFIT Scholar in accordance with guidelines at Open Policy Finder for this journal.

DOI

10.1016/j.nima.2020.164820

Source Publication

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (ISSN 01689002)

Recommended Citation

Egner, Bryan V, Darren E Holland, Larry W Burggraf, and James E Bevins. “Development of a Modular Mixed-Radiation Directional Rotating Scatter Mask Detection System.” Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 987 (January 2021): 164820. https://doi.org/10.1016/j.nima.2020.164820.