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

H. Paradis (1) , A. de Vismes Ott (1) , X. Cagnat (1) , F. Piquemal (2, 3) , R. Gurriaran (1)

1 IRSN/PSE-ENV/SAME/LMRE - Laboratoire de métrologie de la radioactivité dans l'environnement
2 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
3 LSM - UMR 6417 - Laboratoire Souterrain de Modane

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.

Domaines: Physique [physics]

H. Paradis, A. de Vismes Ott, X. Cagnat, F. Piquemal, R. Gurriaran. Leda: A gamma-gamma coincidence spectrometer for the measurement of environment samples. Low-Level Radioactivity Measurement Techniques, Sep 2016, Seattle, United States. pp.179-184, ⟨10.1016/j.apradiso.2016.12.049⟩. ⟨hal-01856634⟩