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A method for measuring thoron and radon gas concentrations using solid-state alpha-particle detectors

โœ Scribed by J. Bigu

Publisher
Elsevier Science
Year
1986
Weight
530 KB
Volume
37
Category
Article
ISSN
0883-2889

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โœฆ Synopsis

A method for measuring thoron and radon gas concentrations has been developed. A sample of the radioactive gas is passed through a filter, to remove its short-lived decay products, and into a small chamber having a diffused-junction (SiDJ) detector, or a silicon-barrier (SiB) detector for gross a-particle counting and, or, a-spectrometric analysis. Gas is allowed to flow through the chamber for about 15 s and the a-activity is followed for a period of time, e.g. 10 min for the thoron case. An analytical technique that takes into account the growth and decay of the radioactive gas and its decay products is used in conjunction with gross a-counting and, or, a-spectral data to compute the gas concentration. The method is particularly suitable for measurements in radon-and thoron-calibration test facilities.

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