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Conference Paper

Ultrapure gases for GERDA


Simgen,  Hardy
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Simgen, H. (2006). Ultrapure gases for GERDA. Progress in Particle and Nuclear Physics, 57(1), 266-268.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-86A7-7
The GERDA experiment searches for the neutrinoless double beta decay of 76Ge. A major reduction of background is envisaged by operating almost bare germanium diodes in ultrapure liquid nitrogen or liquid argon. The purity of the cryogenic liquid in terms of 222Rn is crucial for the success of the experiment. In this work techniques for measuring 222Rn in nitrogen and argon at the μBq/m3 level are presented. It is shown that the required purity can be obtained for both gases, nitrogen and argon.