Photon emission intensities in the decay of U-235

Marie-Christine Lépy; Sylvie Pierre; Raf Van Ammel; Maria Marouli

doi:10.1016/j.apradiso.2016.12.045

Photon emission intensities in the decay of U-235

Appl Radiat Isot. 2017 Aug:126:150-153. doi: 10.1016/j.apradiso.2016.12.045. Epub 2016 Dec 23.

Authors

Marie-Christine Lépy¹, Sylvie Pierre², Raf Van Ammel³, Maria Marouli³

Affiliations

¹ CEA, LIST, Laboratoire National Henri Becquerel, F-91191 Gif-sur-Yvette Cedex, France. Electronic address: marie-christine.lepy@cea.fr.
² CEA, LIST, Laboratoire National Henri Becquerel, F-91191 Gif-sur-Yvette Cedex, France.
³ JRC-Geel, Retieseweg 111, B-2440 Geel, Belgium.

PMID: 28063776
DOI: 10.1016/j.apradiso.2016.12.045

Abstract

New measurements of photon emission intensities in the decay of U-235 were performed. Source was prepared by deposition of a U-235 solution on glass plate. Standardization was carried out by defined solid angle alpha counting, giving the reference activity with 0.7% relative combined uncertainty. Gamma spectrometry was performed with accurately calibrated high-purity germanium detectors. Corrections for source geometry and coincidence summing effects were applied. The reference line (185.72keV) intensity was obtained with 1.3% relative standard uncertainty.

Keywords: NORM; Photon emission intensities; Th-231; U-235.