水氡仪标定技术的实验研究

EXPERIMENTAL STUDY ON THE TECHNIQUE OF CALIBRATION OF THE INSTRUMENT FOR MEASURING RADON IN WATER BY THE SCINTILLATION METHOD

摘要:

准确标定水氡仪是提高水氡观测质量的关键。配制液体镭源标准化是水氡仪标定的关键^[1]。
本文针对全国水氡观测台站普遍反映的问题,就水氡仪标定技术和方法-选择液体镭源、仪器检查调试、液体镭源积累时间、积累前排氡时间,液体镭源体积影响、扩散瓶体积和式样、闪烁室标定周期及寿命、报废液体镭源回收利用等进行一系列实验,並由实验数据而给出结论。

Abstract:

This paper is a report which systematically summarizes the experiments on the technique of calibration in the instrument for measuring radon in water by scintillation method. The following aspects are involved in this study:
1. The selection of the standard radio-active souree of radium in calibration.
2. The inspection and regulation of the instrument.
3. The sealing time for accumulating radon of the liquid source.
4. The time for expelling radon before sealing.
5. The background value of radio activity in the counting sell.
6. The volume of standard source.
7. The volume and shape of the diffusion bottle (used for collecting the samples of radon in water)
8. The time interval between two consecative calibrations in the scintillation sell, and the live time of the sell.
9. The suggestion on setting up the standard source in the level of the provicne, which is more superior than that used in the stations.