为了保障铀同位素作业场所工作人员的安全与健康,需要对空气中铀气溶胶的浓度进行及时监测。 以往对铀气溶胶浓度的监测多用荧光分析法和衰变法。虽然这两种方法的灵敏度较高,设备比较简单,但操作过程较复杂、时间长。 用物理方法对铀气溶胶浓度进行监测,首先要解决比铀气溶胶α放射性控制标准高2—3个数量级的氡钍子体的干扰;其次为使测量结果不超过一定的统计误差,必须采集一 In order to ensure the safety and health of workers in uranium isotope sites, the concentration of uranium aerosol in the air needs to be monitored in time. Previous monitoring of uranium aerosol concentration using multi-fluorescence analysis and decay method. Although the sensitivity of these two methods is relatively high, the equipment is relatively simple, but the operation process is complicated and takes a long time. To monitor the concentration of uranium aerosol by physical methods, we must first solve the interference of radon-thoron bodies that are 2-3 orders of magnitude higher than the uranium aerosol alpha-radioactive control standard. Secondly, we must collect the statistical errors that the measurement results do not exceed certain limits one