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Conference Paper

A Novel Low Background Cryogenic Detector for Radon in Gas

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Zuzel,  G.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Wojcik,  M.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Citation

Zuzel, G., & Wojcik, M. (2006). A Novel Low Background Cryogenic Detector for Radon in Gas. In P. Loaiza (Ed.), Topical workshop on low radioactivity techniques: LRT 2006 (pp. 39-44). American Institute of Physics.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-7F3A-3
Abstract
A prototype of a new detector for measurements of radon in gases and radon emanation investigations is presented. It is based on the low-temperature collection of 222Rn on a stainless steel plate and the following counting of emitted alpha particles using a standard ORTEC semiconductor detector for alpha spectroscopy. A low background of the constructed system was achieved, in the order of 25 counts per day for the 222Rn energy window. Relatively high detection efficiency of 32 % in 2. geometry, and large volume of the detector allow radon concentration measurements at the level of 12 mBq/m3 with a 30 % accuracy. The detector can be also used to measure short-lived 220Rn. In the next step we plan to improve the system so that we could reach the sensitivity of 1 mBq/m3. This can be achieved by reducing the background, improving the detection efficiency and/or increasing the active volume of the detector (with respect to the prototype).