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Open Access Green as soon as Postprint is submitted to ZB.
Thoron detection with an active Radon exposure meter - first results.
Rev. Sci. Instruments 85:022106 (2014)
For state-of-the-art discrimination of Radon and Thoron several measurement techniques can be used, such as active sampling, electrostatic collection, delayed coincidence method, and alpha-particle-spectroscopy. However, most of the devices available are bulky and show high power consumption, rendering them unfeasible for personal exposition monitoring. Based on a Radon exposure meter previously realized at the Helmholtz Center Munich (HMGU), a new electronic prototype for Radon/Thoron monitoring is currently being developed, which features small size and weight. Operating with pin-diode detectors, the low-power passive-sampling device can be used for continuous concentration measurements, employing alpha-particle-spectroscopy and coincidence event registration to distinguish decays originating either from Radon or Thoron isotopes and their decay products. In open geometry, preliminary calibration measurements suggest that one count per hour is produced by a 11 Bq m(-3) Radon atmosphere or by a 15 Bq m(-3) Thoron atmosphere. Future efforts will concentrate on measurements in mixed Radon/Thoron atmospheres.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Lung-cancer; Issue; Risk
ISSN (print) / ISBN
0034-6748
e-ISSN
1089-7623
Journal
Review of Scientific Instruments
Quellenangaben
Volume: 85,
Issue: 2,
Article Number: 022106
Publisher
American Institute of Physics (AIP)
Publishing Place
Melville
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Radiation Protection (ISS)