title: Improvement of a low-level mesurement system used at LNHB.
abstract: In this new approach, the active shielding of a low level spectrometer is monitored by an extendable dead time used as an "extendable GATE" signal. This concept is directly inspired from the live-timed anti-coincidence system implemented at LNE-LNHB (MTR2 modules). This allows a significant reduction in the cost and complexity of the system since several electronic modules are replaced by only one module dedicated specifically to this type of experiment. Settings of this new approach are detailed and results are discussed.
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel, Bât. 602 PC111, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France. Electronic address: laurent.ferreux@cea.fr.
authors.forename: Laurent
authors.initials: L
authors.lastname: Ferreux
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel, Bât. 602 PC111, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France.
authors.forename: Jacques
authors.initials: J
authors.lastname: Bouchard
keywords: Anti-cosmic system; Background analysis; Extendable dead-time; Low-level gamma spectrometry