Xe isotope detection and discrimination using beta spectroscopy with coincident gamma spectroscopy

Abstract Beta spectroscopic techniques show promise of significant improvements for a beta–gamma coincidence counter that is part of a system for analyzing Xe automatically separated from air. The previously developed counting system for 131m Xe, 133m Xe, 133g Xe, and 135g Xe can be enhanced to give additional discrimination between these Xe isotopes by using the plastic scintillation sample cell as a beta spectrometer to resolve the conversion electron peaks. The automated system will be a key factor in monitoring the Comprehensive Test Ban Treaty.