Leda: A gamma-gamma coincidence spectrometer for the measurement of environment samples

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

doi:10.1016/j.apradiso.2016.12.049

Leda: A gamma-gamma coincidence spectrometer for the measurement of environment samples

Appl Radiat Isot. 2017 Aug:126:179-184. doi: 10.1016/j.apradiso.2016.12.049. Epub 2017 Jan 16.

Authors

H Paradis¹, A de Vismes Ott², X Cagnat¹, F Piquemal³, R Gurriaran¹

Affiliations

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

PMID: 28209254
DOI: 10.1016/j.apradiso.2016.12.049

Abstract

This paper presents a new gamma-gamma coincidence spectrometer to measure the radioactivity in environmental samples. This system, called Leda, is made of 2 HPGe and 1 NaI(Tl). The different analysis channels (single, in coincidence or in anti-coincidence) possible thanks to the digital electronics are described. Results obtained with environmental samples are shown. Despite its low efficiency, this method improves the detection limits for all emitters due to its very low background, and thus decreases the counting time.

Keywords: Environment radioactivity; Gamma-gamma coincidence; Gamma-ray spectrometry; MCNP_CP.