Radioxenon standards used in laboratory inter-comparisons

Abstract

Preparation methods for (133)Xe standards of activity concentration and the results of the 2014 (133)Xe laboratory inter-comparison exercise are described. One element of the quality assurance/quality control (QA/QC) program for laboratories of the International Monitoring System (IMS) will be regular inter-comparison exercises. However, until recently, no activity concentration standards for benchmarking were available. Therefore, two (133)Xe activity concentration reference standards were produced independently by Idaho National Laboratory and Seibersdorf Laboratories and used for the 2014 laboratory inter-comparison exercise. The preparation of a complementary (127)Xe activity concentration standard as well as a (127)Xe laboratory inter-comparison exercise suggests (127)Xe as a suitable isotope for QA/QC of remote IMS noble gas stations.

Validation of MCNPX-PoliMi code for simulations of radioxenon beta–gamma coincidence detection

“…This requires an inventory of isotopic ratios from field measurements and simulations. Detector response simulations are useful because they can provide detector information such as detection efficiency, and show the interference of one isotope with another [10], without the production of pure radioxenon samples which requires a variety of processes [11][12][13]. As discussed in [14], the ability to produce beta-gamma spectra can also be used for training exercises.…”