几种220Rn子体测量方法的比较

Comparison of Different Methods for Thoron Progeny Measurement

针对4种目前常用的测量220Rn子体的方法、原理、使用条件、计算方法、优缺点等进行了讨论,并在云南的矿井和土房对这4种方法进行了实验比较。由于室内220Rn浓度随环境条件变化显著,与其衰变产物间缺乏稳定的关系,220Rn子体的时间变化规律尚不清楚,因此,在吸入220Rn的剂量估算中应尽可能使用累积测量法。

Four popular methods for thoron progeny measurement were discussed, including the aspects of detector, principle, precondition, calculation advantages and disadvantages. Comparison experiments were made in mine and houses with high background in Yunnan Province. Since indoor thoron progeny changes with time obviously and with no rule, a track method is recommended in the area of radiation protection for environmental detection and assessment.