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Radiation Protection Dosimetry
Year: 2010  |  Volume: 141  |  Issue: 4  |  Page No.: 448 - 451

A theoretical study on accurate measurements of thoron with airflow-through scintillation cell method

F Tang, W Zhuo, C Zhao, B Chen, Y Xu and L. He    

Abstract:

For accurate measurements of 220Rn concentration with airflow-through scintillation cell method, a theoretical study was performed for discussing the influences of sampling flow rate, volumes of sampling tube and scintillation cell on the measurements. It is found that a high flow rate and a large inner volume of scintillation cell as well as a small inner volume of sampling tube are not only preferable for measuring low levels of 220Rn, but also helpful for enhancing the measurement accuracy. In calibration experiments, both the sampling flow rate and the sampling tube volume should be noted. The variations of the flow rate and tube volume should be considered for accurate measurements in the fields.

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