气溶胶<sup>7</sup>Be活度浓度的测量方法及其应用

气溶胶⁷Be活度浓度的测量方法及其应用

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。

Abstract: 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.