快速鉴别空气中人工放射性污染——β衰变比值法

The Quick Distinguishing of the Artificial Radioactive Contamination of the Air by β-decay Proportional Method

本文阐述了用“β衰变比值法”鉴别空气中长寿命人工β放射性污染的原理。介绍了依据该原理设计的仪器设备,从实测数据分析得到,当天然β气溶胶浓度为7.49Bq/m^3(约2×10^(-13)Ci/L),取样1h,取样量为3.36m^3空气时,取样结束后60min,检出水平为1.82Bq/m^3(4.9×10^(-14)Ci/L);取样结束后150min,检出水平1.77Bq/m^3(4.8×10^(-14)Ci/L)。

The paper describes the principles of the distinction of artificial radioactive contamination of air by'|3-decay proportional method'and gives a brief introduction to the instruments designed according to the principles of tjjis method. Ffom the data processing we conclude as followsj The concentration of (3-aerosol is 7.49Bq/ms(approx2.OX 10-13Ci/L)sampling for one hour, the amount'of sampling air is-3.36m3. And 60 minutes after sampling, the determination level is 1.82 Bq/m3(approx 4.9X1CTU Ci/ D.For 150 minutes duration, the level is 1.77 Bq/ms(approx 4.8X 1CTU Ci/L).