Highly Sensitive Gamma-Spectrometers of Gerda for Material Screening: Part 2
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 gammaspectroscopy. 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 ~10 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.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 960320
- Report Number(s):
- PNNL-SA-57611; NN2003000; TRN: US200923%%393
- Resource Relation:
- Conference: Proceedings of the XIV International Baksan School "Particles and Cosmology" 16-21 April 2007, Baksan Valley, Russian Federation, 233-238
- Country of Publication:
- United States
- Language:
- English
Similar Records
ICP MS selection of radiopure materials for the GERDA experiment
Muon-induced signals and isotope production in the GERDA experiment