Improvement of sensitivity of thoron monitoring with electret

XIAO Detao  1  PAN Ziqiang  2  LING Qiu  1  DONG Liucan  3  J.K.C.Leung  4  1

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Improvement of sensitivity of thoron monitoring with electret

更新时间：2021-03-12

- Improvement of sensitivity of thoron monitoring with electret
- NUCLEAR TECHNIQUES Issue 12, (2002)
- 作者机构：
  
  1. 南华大学核科学技术学院
  2. 中国核工业总公司
  3. 中国原子能科学研究院
  4. 香港大学物理系,衡阳,421001
  5. ,北京,102413
- 作者简介：
- 基金信息：
  
  国家自然科学基金 (10 0 75 0 83)资助
- DOI：
  CLC： TL81
- Published：01 December 2002
- 稿件说明：
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[1]肖德涛,潘自强,凌球,董柳灿,梁干庄.利用驻极体提高测的灵敏度[J].核技术,2002(12):1039-1044.

XIAO Detao 1 PAN Ziqiang 2 LING Qiu 1 DONG Liucan 3 J.K.C.Leung 4 1. Improvement of sensitivity of thoron monitoring with electret[J]. Nuclear techniques, 2002, (12): 1039-1044.
[1]肖德涛,潘自强,凌球,董柳灿,梁干庄.利用驻极体提高测的灵敏度[J].核技术,2002(12):1039-1044. DOI：

XIAO Detao 1 PAN Ziqiang 2 LING Qiu 1 DONG Liucan 3 J.K.C.Leung 4 1. Improvement of sensitivity of thoron monitoring with electret[J]. Nuclear techniques, 2002, (12): 1039-1044. DOI：

摘要

气土的衰变子体跟氡的一样

其大部分（>90 % ）在形成初期是带正电荷的。利用这一特性

在剂量计采样小室加静电场可大大提高测气土灵敏度。利用驻极体在剂量计采样小室产生静电场

用CR - 39SSNTD记录气土及其子体衰变释放的α粒子

从而提高了测气土灵敏度。该方法将平行法测气土和吸收体法测气土的灵敏度分别提高为 8倍和 33倍

Abstract

The sensitivity of thoron monitoring method can be improved largely by applying an electrostatic field in the sampling chamber of thoron dosimeter because more than 90% of the thoron progenies are positively charged at the moment when they generate. The paper introduces a sensitive thoron monitoring method by both using electret to produce electrostatic field in the sampling chamber and using CR-39SSNTD to record α particles emitted from thoron and its progenies. Compared to normal Simultaneous and absorber methods

the new method presents 8 and 33 times sensitivity for thoron monitoring

respectively.

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