期刊论文

中文

四川大学学报(自然科学版)

0490-6756

2022

59

02

146-150

10.19907/j.0490-6756.2022.024004

湖南省自然科学基金（2018JJ2007）； 湖南省研究生科研创新项目（CX20211233）；

本校为第一机构

高探测效率的闪烁室测氡是氡测量的主要方法，但其取样结束后需静置3 h才开始测量.为实现闪烁室快速测氡的需要，在Rn-222、Po-218和Bi-214的探测效率相同的条件下，依据氡及其子体的衰变关系，本文建立了一种闪烁室测氡仪快速定值的方法.此法基于积分计数法，利用测量周期为60 min时的刻度因子K0,计算测量周期为30 min和15 min的理论刻度因子.本文选取对氡及其子体探测效率近似100%的54 mL小闪烁室，在氡浓度为20 Bq/mL的条件下开展快速定值实验.实验结果表明，本文测量的实验值与理论值误差在5%以内，能够实现闪烁室快速测氡.

The scintillation chamber with high detection efficiency is the main method for radon measurement, but it needs to stand for 3 h after sampling before starting measurement. In order to meet the needs of rapid measurement of radon in scintilators, a rapid measurement method for radon in scintilators was established according to the decay relationship of radon and its progeny under the same efficiency condition of Rn-222, Po-218 and Bi-214. Based on the integral counting method, the calibration factor K0 at the measurement period of 60 min was used to calculate the theoretical calibration factor...