A 3D simulation look-up library for real-time airborne gamma-ray spectroscopy

A three-dimensional look-up library consisting of simulated gamma-ray spectra was developed to leverage, in real-time, the abundance of data provided by a helicopter-mounted gamma-ray detection system consisting of 92 CsI-based radiation sensors and exhibiting a highly angular-dependent response. We...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2018-01, Vol.879, p.84-91
Main Authors: Kulisek, Jonathan A., Wittman, Richard S., Miller, Erin A., Kernan, Warnick J., McCall, Jonathon D., McConn, Ron J., Schweppe, John E., Seifert, Carolyn E., Stave, Sean C., Stewart, Trevor N.
Format: Article
Language:English
Subjects:
Airborne gamma-ray spectroscopy
Background estimation
Discrete ordinates
Helicopter-mounted gamma-ray spectroscopy
Monte Carlo
Radiological source localization
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Summary:A three-dimensional look-up library consisting of simulated gamma-ray spectra was developed to leverage, in real-time, the abundance of data provided by a helicopter-mounted gamma-ray detection system consisting of 92 CsI-based radiation sensors and exhibiting a highly angular-dependent response. We have demonstrated how this library can be used to help effectively estimate the terrestrial gamma-ray background, develop simulated flight scenarios, and to localize radiological sources. Source localization accuracy was significantly improved, particularly for weak sources, by estimating the entire gamma-ray spectra while accounting for scattering in the air, and especially off the ground.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2017.10.030