CAJ | 학술논문

研究了可同时测量环境空气中220 Rn及其子体放射性水平的双滤膜活性炭盒法。根据暂时平衡理论，推导了该方法测量空气中220 Rn及其子体的理论公式，明确了取样和测量过程中需要注意的关键参数：对于滤膜过滤收集220 Rn子体，应当使等待时间大于21．4 min，同时等待和测量时间之和小于7．41 h；对于活性炭盒吸附富集220 Rn，应当使等待时间大于6．17 min。使用该方法测定了实验室和某花岗岩坑道内220 Rn及其子体的放射性水平。主动式双滤膜活性炭盒法为环境空气中220 Rn及其子体剂量评价提供了新的技术支持。
연구료가동시측량배경공기중220 Rn급기자체방사성수평적쌍려막활성탄합법。근거잠시평형이론，추도료해방법측량공기중220 Rn급기자체적이론공식，명학료취양화측량과정중수요주의적관건삼수：대우려막과려수집220 Rn자체，응당사등대시간대우21．4 min，동시등대화측량시간지화소우7．41 h；대우활성탄합흡부부집220 Rn，응당사등대시간대우6．17 min。사용해방법측정료실험실화모화강암갱도내220 Rn급기자체적방사성수평。주동식쌍려막활성탄합법위배경공기중220 Rn급기자체제량평개제공료신적기술지지。
The double membrane activated charcoal method measuring 220 Rn and its progeny concentrations in ambient air simultaneously was established .According to the temporary equilibrium theory ,the theoretical for-mula of 220 Rn and its progeny in the air was derived in this method .Aiming at the half-life characteristics of 220 Rn and its progeny, classical theory model was modified and simplified , and several key time points was i-dentified.For 220 Rn progeny collection, the waiting time should be greater than 21.4 minutes after sampling, and the sum of waiting time and measuring time should be less than 7.41 hours.For 220 Rn gas adsorption, the waiting time should be greater than 6.17 minutes.The radioactivity levels of 220 Rn and its progeny in a laborato-ry and in a tunnel was studied by the method .It is provided a new technical support for 220 Rn and its progeny dose assessment by the active membrane activated charcoal method .