title: Leda: A gamma-gamma coincidence spectrometer for the measurement of environment samples.
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.
authors.affiliation: Laboratoire de Mesure de la Radioactivité dans l'Environnement, IRSN, Orsay, France.
authors.forename: H
authors.initials: H
authors.lastname: Paradis
authors.affiliation: Laboratoire de Mesure de la Radioactivité dans l'Environnement, IRSN, Orsay, France. Electronic address: anne.de-vismes@irsn.fr.
authors.forename: A
authors.initials: A
authors.lastname: de Vismes Ott
authors.affiliation: Laboratoire de Mesure de la Radioactivité dans l'Environnement, IRSN, Orsay, France.
authors.forename: X
authors.initials: X
authors.lastname: Cagnat
authors.affiliation: Centre Etudes Nucléaires de Bordeaux Gradignan, CNRS/IN2P3, Gradignan, France; Laboratoire Souterrain de Modane, CNRS/UGA, Modane, France.
authors.forename: F
authors.initials: F
authors.lastname: Piquemal
authors.affiliation: Laboratoire de Mesure de la Radioactivité dans l'Environnement, IRSN, Orsay, France.
authors.forename: R
authors.initials: R
authors.lastname: Gurriaran
keywords: Environment radioactivity; Gamma-gamma coincidence; Gamma-ray spectrometry; MCNP_CP