| Qian Yuxin,Yin Liangliang,Xie Yuhan,et al.Study on source thickness and counting efficiency calibration for determining gross alpha activity in drinking water[J].Chinese Journal of Radiological Medicine and Protection,2021,41(12):937-940 |
| Study on source thickness and counting efficiency calibration for determining gross alpha activity in drinking water |
| Received:July 05, 2021 |
| DOI：10.3760/cma.j.issn.0254-5098.2021.12.010 |
| KeyWords:Drinking water Radioactivity Gross α Mass thickness Counting efficiency |
| FundProject:国家科技基础性工作专项（2014YF211000） |
| Author Name | Affiliation | E-mail | | Qian Yuxin | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Yin Liangliang | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Xie Yuhan | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Ji Yanqin | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | jiyanqin@nirp.chinacdc.cn |
|
| Hits: 3217 |
| Download times: 1689 |
| Abstract:: |
| Objective To study the influence of source thickness and counting efficiency calibration on the measurement of gross alpha activity in water. Methods 241Am and natural uranium reference materials were spiked in drinking water to prepare source on a planchet with different thickness, for counting alpha activity on the planchet. Results The effective thickness measured by spiking 241Am or uranium standard solution in water sample was consistent with the empirical value of 4 mg/cm2. The alpha counting rate was in a linear increase trend from 2A-5A mg/cm2 and was basically stable and no longer increase when thickness was higher than 10A mg/cm2 (A was area of planchet). The result calculated by effective thickness method and thick source method were in good agreement when thickness was 10A mg/cm2. Conclusions In order to reduce the deviation of gross alpha counting rate caused by the source thickness and counting efficiency calibration, the source thickness is recommended to be 10A mg/cm2. |
| HTML View Full Text View/Add Comment Download reader |
| Close |
|
|
|
