García-León M, Piazza C, Madurga G
Int J Appl Radiat Isot. 1984 Oct;35(10):961-3. doi: 10.1016/0020-708x(84)90211-4.
In this work, 99Tc activities in atmospheric filters taken during the years 1965, 1966 and 1967 are measured on a monthly or bimonthly basis. The results show a clear yearly pattern of the activities with a maximum below 3 mBq/1000 m3 at the end of each summer, probably related, in a non trivial way, to meteorological factors. Our atmospheric 99Tc data add a more detailed structure to previously published fallout curves.
在这项工作中，对1965年、1966年和1967年采集的大气过滤器中的99Tc活度进行了每月或每两个月一次的测量。结果显示，活度呈现出明显的年度模式，每年夏末的最大值低于3毫贝克勒尔/1000立方米，这可能与气象因素存在某种复杂的关联。我们的大气99Tc数据为先前发表的沉降曲线增添了更详细的结构。
