Measurement of radon and thoron concentrations in indoor airby using an active charcoal canister

GUAN Zujie

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Measurement of radon and thoron concentrations in indoor airby using an active charcoal canister

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- Measurement of radon and thoron concentrations in indoor airby using an active charcoal canister
- NUCLEAR TECHNIQUES Issue 3, (1998)
- 作者机构：
  
  1. 中山大学
  2. 香港城市大学
  3. 中山大学香港城市大学
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL817
- Published：01 March 1998
- 稿件说明：
移动端阅览
[1]关祖杰,余君岳,杨健明.用主动式活性炭盒测定室内环境的~(222)Rn和~(220)Rn浓度[J].核技术,1998(03):172-177.

GUAN Zujie. Measurement of radon and thoron concentrations in indoor airby using an active charcoal canister[J]. Nuclear techniques, 1998, (3).
[1]关祖杰,余君岳,杨健明.用主动式活性炭盒测定室内环境的~(222)Rn和~(220)Rn浓度[J].核技术,1998(03):172-177. DOI：

GUAN Zujie. Measurement of radon and thoron concentrations in indoor airby using an active charcoal canister[J]. Nuclear techniques, 1998, (3). DOI：

摘要

把１０ｃｍ被动式活性炭盒稍加改装后进行主动式空气来样，用高效率ＨＰＧｅγ谱仪测量的２２２Ｒｎ／２２０Ｒｎ短寿命子体的３５２ｋｅＶ／２３９ｋｅＶ的γ射线净峰面积，经刻度后可同时得到空气中２２２Ｒｎ和２２０的浓度。２２２Ｒｎ和２２０Ｒｎ的实测刻度因子分别为０．２６３Ｂｑ－１．ｍ３．ｍｉｎ－１和０．１８２Ｂｑ－１．ｍ３．ｍｉｎ－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４５．５－１４０Ｂｑ．ｍ－３，２２０Ｒｎ浓度为４．９２－１４．２Ｂｑ．ｍ－３。

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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Related Author

ZHANG Lei1 LIANG Juncheng2 WU Jian1 GUO Qiuju1 1

梁珺成

吴建

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State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China ) 2

中国计量科学研究院电离辐射与医学所

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