Title: Low Background Aspects of GERDA
Citation: American Institute of Physics (AIP) Conference Series vol. 1338 no. 1 p. 149-155
Publisher: American Institute of Physics
Publication Year: 2011
JRC N°: JRC62485
URI: http://dx.doi.org/10.1063/1.3579573
DOI: 10.1063/1.3579573
Type: Articles in periodicals and books
Abstract: The GERDA experiment operates bare Germanium diodes enriched in 76Ge in an environment of pure liquid argon to search for neutrinoless double beta decay. A very low radioactive background is essential for the success of the experiment. We present here the research done in order to remove radio-impurities coming from the liquid argon, the stainless steel cryostat and the front-end electronics. We found that liquid argon can be purified efficiently from 222Rn. The main source of 222Rn in GERDA is the cryostat which emanates about 55 mBq. A thin copper shroud in the center of the cryostat was implemented to prevent radon from approaching the diodes. Gamma ray screening of radio-pure components for front-end electronics resulted in the development of a pre-amplifier with a total activity of less than 1 mBq 228Th.
JRC Directorate:Health, Consumers and Reference Materials

Files in This Item:
There are no files associated with this item.

Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.