Development of an energy discriminate CR-39^® nuclear track etch dosimeter for Radon-220 gas measurements

详细信息    查看全文

• 作者：J.M.C. Brown^a ; S. Solomon^a ; R.A. Tinker ; ^a ; ^{Rick.Tinker@arpnsa.gov.au"" rel=""nofollow}
• 关键词：Nuclear track etch ; ²²⁰Rn ; ²²²Rn ; CR-39^&#xae ; ; Mylar^&#xae ; C ; Environmental radon monitoring
• 刊名：Journal of Environmental Radioactivity
• 出版年：2011
• 出版时间：October 2011
• 年：2011
• 卷：102
• 期：10
• 页码：901-905
• 全文大小：535 K

文摘

An energy discriminate CR-39^® nuclear track etch dosimeter for use in a ²²⁰Rn and ²²²Rn gas monitor has been developed and experimentally assessed. It utilises a thin film of Mylar^® C to attenuate the alpha particle energies to allow only the damage tracks created by the 8.785 MeV alpha particles emitted from ²¹²Po of the ²³²Th decay chain to be registered in the CR-39^® plaque, allowing for the direct measurement of ²²⁰Rn gas concentrations. The dosimeter was developed through a combination of experimental investigations and theoretical simulations using the Monte Carlo ion transport modelling program Stopping and Range of Ions in Materials (SRIM 2008). A film thickness of 54 μm has been shown to attenuate all alpha energies less then 7.7 MeV.