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Radiation Protection Dosimetry
Year: 2010  |  Volume: 141  |  Issue: 4  |  Page No.: 444 - 447

Characteristic and performance of a simple thoron chamber

C Zhao, W Zhuo, B Chen and H. Zhang    

Abstract:

For calibration and intercomparison experiments, a thoron chamber with an inner volume of 300 l was designed based on a programmable constant temperature and humidity testing device in this work. The commercial lantern mantles enriched with 232Th were used as the 220Rn source and the mantles were set in 3x3x3 points of lattice style inside the chamber. Experimental studies showed that 220Rn concentrations in the chamber could be easily controlled and adjusted from about 0.5 to 80 kBq m–3 through manual settings of the relative humidity and temperature, and the spatial distribution of 220Rn in the chamber was fairly homogeneous.

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