固体核径迹探测器测量氡子体平衡因子

MEASUREMENT OF EQUILIBRIUM FACTOR FOR RADON DAUGHTERS BY SSNTD

本文介绍了用带和不带过滤膜的两个固体核径迹探测器测量氡及其子体平衡因子的原理和方法。用自行设计的这类探测器实验刻度了测量氡及其子体平衡因子的校准系数。所得氡浓度校准系数随相对湿度、含尘量等环境条件变化不大，为１．２０±０．１５（径迹／ｃｍ２）／（ｋＢｑｈｍ－３）；而平衡因子的校准系数则随相对湿度、有无尘源的不同变化较大。此项工作为同时测量累积的平均氡浓度及平衡因子提供了一个初步的、较简便的方法。

This paper presents a method and its principle of measuring radon concentration and equilibrium factor( F ) by using two SSNTDs,of which one is with filter,the other without. The detector developed in our labortary was calibrated in standard radon chamber.The calibration factor of radon concentration is about 1.20±0.15(tracks/cm 2)/(kBq·h·m -3 ),and is less dependent on the relative humidity and aerosol concentration.The calibration factor of F is very scattered and mainly affected by relative humidity and aeronsol concentration.This work affords a simple,convenient method for measuring the average radon concentration and F . (