泄露和反扩散对氡析出率测量的影响研究

Research on the Effect of Leakage and Back Diffusion on Measurement Radon Exhalation Rate

为研究累积法测量介质表面氡析出率时泄漏和反扩散对测量结果的影响,通过引入泄露和反扩散率并在南华大学氡析出率标准参考装置上不同的实验条件下测量。测量结果表明,集氡室与待测介质表面的密封程度不会影响氡析出率的准确可靠测量。引入泄露和反扩散率为现场氡析出率的准确可靠测量提供方法保障。

In order to study the effect on measurement results which are from the leakage and back - diffusion when measuring the exhalation rate of radon from material surface by means of accumulation method, the meas- urement was conducted under different experimental conditions at the standard radon exhalation reference device at University of South China by introducing the rate of leakage and back - diffusion. The results indicated that there was no apparent correlation between the accuracy of measurement and the tightness of the surface between material and radon enrichment chamber. The introduction of the rate of leakage and back - diffusion guaranteed the reliability and accuracy of field experiment of radon exhalation rate.