Low level measurement of (60)Co by gamma ray spectrometry using γ-γ coincidence

H Paradis; A de Vismes Ott; M Luo; X Cagnat; F Piquemal; R Gurriaran

doi:10.1016/j.apradiso.2015.11.075

Low level measurement of (60)Co by gamma ray spectrometry using γ-γ coincidence

Appl Radiat Isot. 2016 Mar:109:487-492. doi: 10.1016/j.apradiso.2015.11.075. Epub 2015 Dec 2.

Authors

H Paradis¹, A de Vismes Ott², M Luo², X Cagnat², F Piquemal³, R Gurriaran²

Affiliations

¹ Laboratoire de Mesure de la Radioactivité dans l'Environnement, IRSN, Orsay, France. Electronic address: hugues.paradis@irsn.fr.
² Laboratoire de Mesure de la Radioactivité dans l'Environnement, IRSN, Orsay, France.
³ Centre Etudes Nucléaires de Bordeaux Gradignan, CNRS/IN2P3, Gradignan, France; LSM, Laboratoire Souterrain de Modane, Modane, France.

PMID: 26682892
DOI: 10.1016/j.apradiso.2015.11.075

Abstract

This paper presents the latest development of the laboratory to measure the natural and artificial massic activities in environmental samples. The measurement method of coincident emitters by gamma-gamma coincidence using an anti-Compton device and its digital electronics is described. Results obtained with environmental samples are shown. Despite its low efficiency, this method decreases detection limits of (60)Co for certain samples compared to conventional gamma-ray spectrometry due to its very low background.

Keywords: Gamma-gamma coincidence; Gamma-ray spectrometry; Ge; Low level radioactivity; NaI(Tl).