A high-sensitivity large volume cryogenic detector for radon in gas

Wójcik, M.; Zuzel, G.

doi:10.1007/s10967-008-0730-7

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A high-sensitivity large volume 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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Citation

Wójcik, M., & Zuzel, G. (2008). A high-sensitivity large volume cryogenic detector for radon in gas. Journal of Radioanalytical and Nuclear Chemistry, 277(1), 199-205. doi:10.1007/s10967-008-0730-7.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-79A6-3

Abstract

A new detector for 222Rn measurements in gases is described. It is based on the low temperature collection of radon on a stainless steel plate and subsequent counting of emitted alpha particles using an ion-implanted silicon detector. A very low background of 25 counts/day for the 222Rn energy window was achieved. High detection efficiency of 32 % (2. geometry) and the large 65 liter volume of the detector allow radon measurements at the level of 12 mBq/m3 with 30 % accuracy (relative error). Behavior of the alpha emitting radon daughters born on the cooled stainless steel plate, 218Po and 214Po, was also analyzed.