| 用主动式活性炭盒测定室内环境的^222Rn和^220Rn浓度 |
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| 引用本文： | 关祖杰,余君岳.用主动式活性炭盒测定室内环境的^222Rn和^220Rn浓度[J].核技术,1998,21(3):172-177. |
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| 作者姓名： | 关祖杰 余君岳 |
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| 作者单位： | [1]中山大学 [2]香港城市大学 |
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| 摘 要： | 把φ１０ｃｍ被动式活性炭盒稍加改装后进行主动式空气采样，用高效率ＨＰＧｅγ谱仪测量＾２２２Ｒｎ／＾２２０Ｒｎ短寿命子体的３５２ＫｅＶ／２３９ＫｅＶ的γ射线净峰面积，经刻度后可财得到空气中＾２２２Ｒｎ的浓度，＾２２２Ｒｎ和２２０Ｒｎ的实测刻度因子分别为０．２６３Ｂｑ＾－１．ｍ＾３．ｍｉｎ＾－１和０．１８２Ｂｑ＾－１．ｍ＾３．ｃｍ＾－１，给出室内环境和经各种空气处理的试验性测量结果，＾２２２Ｒｎ浓度为
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| 关 键 词： | 活性炭盒 主动式 空气采样 γ谱仪 氡射气 室内 |
Measurement of radon and thoron concentrations in indoor airby using an active charcoal canister |
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| GUAN Zujie.Measurement of radon and thoron concentrations in indoor airby using an active charcoal canister[J].Nuclear Techniques,1998,21(3):172-177. |
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| Authors: | GUAN Zujie |
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| Abstract: | In order to measure the concentrations of 222Rn and 220Rn in indoor air, the slightly refitted 10cm charcoal canister has been used for active sampling. After sampling, the charcoal canister has been measured by using a gamma- ray spectrometer and a HPGe detector. After calibration, concentrations of 222Rn and 220Rn have been obtained according to two characteristic Y peaks at 352 and 239keV. For 222Rn and 220Rn calibration factors were 0.263 and 0. 182m3Bq-1min.-1, respectively, The above validation method has been tested by measuring 222Rn and 220Rn concentrations in one general laboratory and one dwelling under different conditions. The 222Rn concentration has been found to be 45.5 - 140Bq. m-3 and the 220Rn concentration to be 4.92-14.2Bq . m-3 |
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| Keywords: | Charcoal canister Active sampling HPGe y spectrometer 222Rn 220Rn |
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