Comparison of the phoswich and ARSA-type detectors for radioxenon detection

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Title: Comparison of the phoswich and ARSA-type detectors for radioxenon detection
Author: Ward, Rebecca Morgan
Abstract: The Comprehensive Nuclear Test Ban Treaty verification regime mandates atmospheric monitoring for the four radioxenon isotopes that are produced in high abundance in a nuclear explosion : [superscript 131m]Xe , [superscript 133m]Xe , [superscript 133g]Xe , and [superscript 135g]Xe . This mandate has driven the development of improved xenon detectors , including a phoswich detector , which has potential to replace the ARSA detector in the International Monitoring System . In this experiment , the four relevant radioxenon isotopes were produced through neutron activation and the phoswich detector was used to attain spectra from the gas . Spectral characteristics and resolution of the phoswich spectra were compared to an ARSA -type [beta] -[gamma] coincidence detector to perform an overall evaluation of the phoswich detector . The results indicated that spectral characteristics and resolutions for the phoswich were comparable to the ARSA -type detector , with slightly improved beta detection . As an additional test of the new detector's capabilities , a tailored spectrum designed to mimic a nuclear explosion signature was produced and analyzed with the detector .
URI: http : / /hdl .handle .net /2152 /ETD -UT -2010 -05 -1016
Date: 2010-10-25

Citation

Comparison of the phoswich and ARSA-type detectors for radioxenon detection. Master's thesis, University of Texas at Austin. Available electronically from http : / /hdl .handle .net /2152 /ETD -UT -2010 -05 -1016 .

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