摘要
用三层滤膜法测定7Be气溶胶的过滤效率,并对测量结果进行衰变修正,得到过滤效率为85.7%。同时,分析研究杭州附近气溶胶7Be活度浓度的年变化规律,得出主要原因是季节性降雨。
The filtration efficiency of 7Be aerosol was measured by the method of three-layer membrane.The filtration efficiency of 7Be aerosol is 85.7% with amendment on decay effect.The annual change regularity of 7Be aerosol activity concentration around Hangzhou area was analyzed,and it is concluded that the main reason is the seasonal rainfall.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2011年第4期487-490,共4页
Atomic Energy Science and Technology
关键词
气溶胶
7Be活度浓度
过滤效率
衰变修正
季节性变化规律
aerosol
7Be activity concentration
filtration efficiency
decay amendment
seasonal variation
