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          Institute: MPI für Kernphysik     Collection: Dark Matter Physics     Display Documents

ID: 367098.0, MPI für Kernphysik / Dark Matter Physics
Highly sensitive gamma-spectrometers of GERDA for material screening: Part II.
Authors:Budjas, Dusan; Hampel, Wolfgang; Heisel, Mark; Keillor, Marty; Laubenstein, Matthias; Maneschg, Werner; Rugel, Georg; Schönert, Stefan; Simgen, Hardy; Strecker, Herbert
Date of Publication (YYYY-MM-DD):2008
Title of Proceedings:The Proceedings of the 14th International Baksan School "Particles and Cosmology-2007"
Name of Conference/Meeting:14th International Baksan School "Particles and Cosmology-2007"
Place of Conference/Meeting:Baksan Valley, Kabardino-Balkaria, Russian Federation
(Start) Date of Conference/Meeting
End Date of Conference/Meeting 
Review Status:not specified
Audience:Experts Only
Abstract / Description:The previous article about material screening for Gerda points out the importance of strict material screening and selection for radioimpurities as a key to meet the aspired background levels of the Gerda experiment. This is directly done using low-level gamma-spectroscopy. In order to provide sufficient selective power in the mBq/kg range and below, the employed gamma-spectrometers themselves have to meet strict material requirements, and make use of an elaborate shielding system.

This article gives an account of the setup of two such spectrometers. Corrado is located in a depth of 15 m w.e. at the MPI-K in Heidelberg (Germany), Gempi III is situated at the Gran-Sasso underground laboratory at 3500 m w.e. (Italy). The latter one aims at detecting sample activities of the order µBq/kg, which is the current state-of-the-art level. The applied techniques to meet the respective needs are discussed and demonstrated by experimental results.
External Publication Status:submitted
Document Type:Conference-Paper
Affiliations:MPI für Kernphysik/Group of M. Lindner
External Affiliations:Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, USA
Laboratori Nazionali Del Gran Sasso, SS 17 bis Km18+910, 67010 Assergi (AQ), Italy
Technische Universität München (E15), James-Franck-Strasse 1, 85747 Garching, Germany
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