摘要
双滤膜法求取过滤效率，在只有一台低本底α、β测量系统情况下，依次轮流测量第一、二层样品的α、β每三分钟计数，并求得衰变常数－００１９９、００２０１对第二层各值进行修正并由其计算得滤膜的过滤效率为８７％左右。
Relying on the only α,β measure system,the α,β counts per three minutes in the sample of the first and second filter are worked out,so is the decay constant-00199,00201.After the revision of the values in the second layer,the filtering efficiency is about 87%.
出处
《云南环境科学》
1998年第2期63-64,共2页
Yunnan Environmental Science
