| 贺三军,赵修良*,刘丽艳,曹光辉,练德幸.222Rn/220Rn绝对测量小闪烁室的ZnS(Ag)涂层厚度确定[J].南华大学学报(自然科学版),2012,26(1):19~23.[HE San-jun,ZHAO Xiu-liang*,LIU Li-yan,CAO Guang-hui,LIAN De-xing.ZnS(Ag) Coating Layer Thickness Verification of One Small Scintillation Cell for 222Rn/220Rn Absolute Measurement[J].Journal of University of South China(Science and Technology),2012,26(1):19~23.] |
| 222Rn/220Rn绝对测量小闪烁室的ZnS(Ag)涂层厚度确定 |
| ZnS(Ag) Coating Layer Thickness Verification of One Small Scintillation Cell for 222Rn/220Rn Absolute Measurement |
| 投稿时间：2012-02-08 |
| DOI： |
| 中文关键词: ZnS(Ag) 涂层厚度 小闪烁室 222Rn/220Rn 绝对测量 |
| 英文关键词:ZnS(Ag) coating layer thickness small scintillation cell 222Rn/220Rn absolute measurement |
| 基金项目:2009年湖南省教育厅研究生科研创新基金资助项目(2009CXJJ4) |
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| 中文摘要: |
| ZnS(Ag)涂层厚度会影响222Rn/220Rn绝对测量小闪烁室的探测效率.用241Amα电镀参考源对厚度为10 mg/cm2的ZnS(Ag)涂层α探测效率进行了实验验证.分别采用解析方法与MCNP模拟方法计算了相对立体角修正因子，讨论了空气层对α粒子的吸收修正，分析了不确定度来源.实验结果表明，10 mg/cm2 ZnS(Ag)涂层对α粒子的探测效率在102.4%～103.1%之间，不确定度小于5.44%.在实验不确定度范围内，可认为其对α粒子的探测效率为100%.实验证明了222Rn/220Rn绝对测量小闪烁室内采用10 mg/cm2厚的ZnS(Ag)涂层是可行的. |
| 英文摘要: |
| The detection efficiency of one small scintillation cell for 222Rn/220Rn absolute measurement can be affected by ZnS (Ag) coating layer thickness on the inner wall of the small scintillation cell.The α detection efficiency of 10 mg/cm2 thickness ZnS (Ag) coating layer has been tested and verified using a plating reference source (241Am).The solid angle correction factor is calculated by analysis and MCNP simulation methods.The absorption correction of air layer on α particle has been discussed.The source of uncertainty has been analysed.The results indicate the α detection efficiency of 10 mg/cm2 thickness ZnS (Ag) coating layer is between 102.4%～103.1% while the uncertainty is less than 5.44%.In the uncertain range α detection efficiency of it is considered as 100%.10 mg/cm2 thickness ZnS (Ag) coating layer can be used to apply on the inner wall of the small scintillation cell for |
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