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Modeling β-γ coincidence spectra of 131mXe, 133Xe, 133mXe, and 135Xe

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Abstract

In support of the Comprehensive Nuclear-Test-Ban Treaty (CTBT), improvements have been made to the model of the Automated Radioxenon Sampler/Analyzer (ARSA) β-γ coincidence detector for radioxenon monitoring. MCNPX is used to simulate the detector response for all the electrons and photons emitted from 131mXe, 133Xe, 133mXe, 135Xe, and 137Cs signals. A MatLab code was written to incorporate the MCNPX results in the calculation of β-γ coincidence spectra. These will aid in the development of the Spectral Deconvolution Analysis Tool (SDAT)1 and to calibrate β-γ coincidence systems. The models developed for this work include improvements over previous models in their ability to address Compton scattering in the β-cell, and the β-distribution offset in the 31 keV γ-ray region for 133Xe.

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Correspondence to D. A. Haas.

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Haas, D.A., Biegalski, S.R. & Foltz Biegalski, K.M. Modeling β-γ coincidence spectra of 131mXe, 133Xe, 133mXe, and 135Xe. J Radioanal Nucl Chem 277, 561–565 (2008). https://doi.org/10.1007/s10967-007-7178-z

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  • DOI: https://doi.org/10.1007/s10967-007-7178-z

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