Uncertainty in radon measurements with CR39 detector due to unknown deposition of ²¹⁸Po

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• 作者：Nikezic ; D. ; Yu ; K.N.
• 关键词：29.40 ; 23.60 ; Natural radioactivity ; Radon ; CR39 detector ; Detector sensitivity ; Monte Carlo methods
• 刊名：Nuclear Instruments and Methods in Physics Research Section A ; Accelerators ; Spectrometers ; Detectors and Associated Equipment
• 出版年：2000
• 期刊代码：41_01689002
• 类别：ph
• 出版时间：August 11, 2000
• 卷：450
• 期：2-3
• 页码：568-572
• 文件大小：153 K

摘要

Uncertainty in radon measurements using the CR39 solid-state nuclear track detector in chambers is introduced by the unknown fraction f₁ of ²¹⁸Po that deposited onto the inner chamber walls. This uncertainty was estimated for cylindrical chambers with different size in the present study. It was found that the uncertainty increased with the chamber height and radius. For short chambers with a height H=2cm the uncertainty was less than 5%, while in tall chambers with H=7cm it could be up to 17%. The radial track density on the CR39 detector inside the diffusion chamber was also found to be dependent on the fraction f₁. In this work, some examples of this dependence are shown.