论文部分内容阅读
目的了解和掌握深圳地区放射工作单位室内的γ辐射累积本底剂量及动态变化情况,为评价和估算深圳地区γ室内辐射本底水平及居民外照射吸收剂量的提供参考依据。方法用LiF(Mg、Cu、P)热释光剂量元件测定每个季度的累积剂量,再统一转换为一个月的累积剂量进行比较。结果 2013-2015年3年放射工作单位室内γ辐射累积剂量平均值为分别为0.142 mSv/月、0.135 mSv/月、0.130 mSv/月,大鹏新区和坪山新区放射工作单位室内γ辐射水平略高于深圳其它各地区,但处于正常本底水平范围内。结论三年深圳市放射工作单位室内γ辐射累积本底剂量变化不大,在正常γ辐射本底范围内。
OBJECTIVE To understand and grasp the accumulated background dose and dynamic changes of γ radiation in radiological units in Shenzhen and to provide a reference for evaluating and estimating the indoor radiation background of γ in Shenzhen and the absorbed dose of resident external radiation. Methods The cumulative doses of LiF (Mg, Cu, P) thermoluminescent dose components were measured every quarter, and then converted to one month cumulative dose for comparison. Results The average indoor γ radiation dose of radiation work units in 2013-2015 was 0.142 mSv / month, 0.135 mSv / month and 0.130 mSv / month, respectively. The indoor gamma radiation level in Dapeng New Area and Pingshan New Area was slightly higher In other parts of Shenzhen, but within the normal background level. Conclusions The cumulative background dose of indoor γ radiation in the radiation work units in Shenzhen Municipality has not changed much in the past three years, and falls within the range of the normal γ-radiation background.