期刊论文

Xiao, D.

中文

核技术

0253-3219

2005

28

9

688-692

10.3321/j.issn:0253-3219.2005.09.011

国家自然科学基金资助项目（10075083）； 湖南省科技计划重点资助项目（04FJ4064）；

本校为第一且通讯机构

利用^220Rn子体ThC’衰变产生的α粒子能量较氡及其子体衰变产生的α粒子能量都高的特点，发展了一种^220Rn测量的吸收体方法。本文介绍了加吸收体甄别氡及实现^220Rn直接测量的原理、剂量计及其刻度方法。该剂量计测量^220Rn暴露量和介质表面^220Rn析出率的刻度系数分别为R0=0．0767cm^-2。（kBq·m^-3·h）^-1和R=0．1300cm^-2（kBq·m^-3·h）^-1。当测量周期7d，所用CR-39本底径迹密度标准差S1=1．6cm^-2时，其测^220Rn浓度与^220Rn析出率的探测下限分别为LLDC=248．4Bq·m^-3和LLDE=34．8mBq·m^-2·S^-1。^220Rn累积测量的吸收体法在环境^220Rn水平测量、室内^220Rn及其子体水平分布测量和...

An integrated thoron measurement method with absorber was developed based on the characteristic of thorium C' which emits an α particle with higher energy than that of a particles released from radon and radon progenies. The principle of discriminating radon and realizing thoron measurement with absorber, a passive and integrated thoron monitor developed and its calibration method are introduced. The calibration coefficients of the monitor are R0 = 0.0767cm-2 (kBq ·m-3 ·h)-1 for thoron exposure measurement and R = 0.1300 cm-2(kBq·m3·h)-1 f...