【摘要】 <正> 环境氡(²²²Rn)子体可诱发肺癌已得到公认。Harley 等提出了一种用于预测环境²²²Rn 所致肺癌的危险度模型,估计在不吸烟的患肺癌的居民中约有20～100%的肺癌来源于环境²²²Rn 及其子体的照射、另一估更多还原

【Abstract】 The levels of radon and its daughter products together with their diurnal and seasonal changes in internal and external environments of typical residences and living quarters of Shenyang city were reported.The geo- metric mean of radon concentrations inside and outside the rooms were 40.2 and 14.1 B_q·M^-3 respectively, their geometric standard deviations were 1.9 and 1.7 and the equilibrium equivalent radon concentrations in- side and outside the rooms were 16.1 and 6.3 B_q·M^-3,respectively. The results of measurements inside and outside the rooms showed that the maximum values were in the small hours for inside and at the midnight for outside of the room,while the minimun values were in the afternoon both inside and outside the rooms.The seasonal variations indicated that the maximum concentra- tion was in winters and the minimum in summers.The average concentration in autumn was close to the annual average.The average annual effective dose equivalent thus evaluated for irradiation from both inside and outside of the room was approximately 1.18mSv.更多还原