title: Standardization of xenon-127 and measurement of photon emission intensities.
abstract: Xenon-127 was standardized by internal gas counting using three proportional counters in a differential arrangement to eliminate edge effects. The detection efficiency of the proportional counters was calculated by considering the cascade of events following the electron capture and associated gamma transitions. Activity per unit volume was measured with 0.7% relative standard uncertainty. Gamma-ray spectrometry was performed and absolute photon emission intensities were derived. This study shows that (127)Xe could be a surrogate for (133)Xe for the calibration of remote radio-xenon monitoring stations.
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel, Gif-sur-Yvette F-91191, France.
authors.forename: M
authors.initials: M
authors.lastname: Rodrigues
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel, Gif-sur-Yvette F-91191, France.
authors.forename: M-C
authors.initials: MC
authors.lastname: Lépy
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel, Gif-sur-Yvette F-91191, France. Electronic address: Philippe.cassette@cea.fr.
authors.forename: P
authors.initials: P
authors.lastname: Cassette
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel, Gif-sur-Yvette F-91191, France.
authors.forename: X
authors.initials: X
authors.lastname: Mougeot
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel, Gif-sur-Yvette F-91191, France.
authors.forename: M M
authors.initials: MM
authors.lastname: Bé
keywords: Activity standardization; CTBTO; Gamma emission intensity; Proportional counters; Xe-127