NRL-1型测氡仪的绝对湿度效应研究

本文根据目前国内外对绝对湿度效应的研究现状，针对绝对湿度对NRL-1型测氡仪探测效率的影响，建立了NRL-1型测氡仪温湿度修正的实验方案。通过对南华大学氡实验室氡活度浓度的控制、温湿度调节方案进行分析与改进，控制实验中的绝对湿度变化，得到了不同绝对湿度下的修正因子，并获得了绝对湿度在1.90~14.91 g/m3范围内的温湿度修正曲线，从而成功地对NRL-1型测氡仪进行了温湿度效应修正。实验结果表明：综合考虑绝对湿度的情况下，在绝对湿度小于2.4 g/m³时，NRL-1型连续测氡仪的收集效率趋近于常数；其绝对湿度的修正因子基本接近于1；而随着绝对湿度的增大，修正因子呈非线性增长。

Study on Absolute Humidity Influence of NRL-1 Measuring Apparatus for Radon

The absolute humidity and temperature’s effects on the NRL-1 measuring apparatus for radon were studied in this paper. By controlling the radon activity concentration of the radon laboratory in University of South China and improving the temperature and humidity adjust strategy, different correction factor values under different absolute humidities were obtained. Moreover, a correction curve between 1.90 and 14.91 g/m³ was also attained. The results show that in the case of absolute humidity, when it is less than 2.4 g/m³, collection efficiency of the NRL-1 measuring apparatus for radon tends to be constant, and the correction factor of the absolute humidity closes to 1. However, the correction factor increases nonlinearly along with the absolute humidity.