Thoron in the environment and its related issues

被引:0
作者
Shinji Tokonami
机构
[1] National Institute of Radiological Sciences,
来源
Indian Journal of Physics | 2009年 / 83卷
关键词
Radon; thoron; measurement; exposure; lung cancer; epidemiology; 23.60.+e;
D O I
暂无
中图分类号
学科分类号
摘要
Since radon is internationally noted as the second cause of lung cancer, many countries are trying about to solve the problem worldwide. In addition, a new evidence of lung cancer risk has been recently found out with a low level below 200 Bq m−3. Thus the action level will have to be set lower than before. Importance of radon exposure has been further recognized and accurate radon concentrations will be required. Recently thoron has also been recognized from the viewpoint of accurate radon measurements. The present paper describes specification of the NIRS radon and thoron chambers, passive measurement technique of radon and thoron and thoron interference on radon measurements from both experimental studies and field experiences on epidemiological study area.
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收藏
页码:777 / 785
页数:8
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