Cannizzaro F, Greco G, Raneli M, Spitale M C, Tomarchio E
Dipartimento di Ingegneria Nucleare, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy.
J Environ Radioact. 2004;72(3):259-71. doi: 10.1016/S0265-931X(03)00177-2.
Air activity concentrations of (7)Be in Palermo determined for the period January 1995-December 2002 by gamma-ray spectrometric analysis of particulate samples collected on paper filter by a high-volume sampler (approximately 900 m(3) h(-1)) are reported. The temporal behaviour of (7)Be concentration presents the same characteristics already observed in the measurements carried out over the previous 13-year (1982-1994) investigated period. The mean value of 5.06 mBq m(-3) obtained from the analysis of the 4636 particulate samples collected from 1982 to 2002 can be considered a representative value of (7)Be air concentration at ground level in our geographical zone. The comparison of long-term variation in the (7)Be concentrations with the cyclic solar activity-extended to the whole period of 21 years-confirms the inverse correlation between the two quantities.
报告了通过对大容量采样器（约900立方米/小时）收集在纸质滤膜上的颗粒物样品进行伽马射线光谱分析，测定的1995年1月至2002年12月期间巴勒莫空气中（7）铍的活度浓度。（7）铍浓度的时间行为呈现出在之前13年（1982 - 1994年）调查期间所进行的测量中已经观察到的相同特征。从1982年至2002年收集的4636个颗粒物样品分析中获得的5.06毫贝克勒尔/立方米的平均值，可以被视为我们地理区域地面水平（7）铍空气浓度的代表值。将（7）铍浓度的长期变化与长达21年的周期性太阳活动进行比较，证实了这两个量之间的负相关关系。
