Variations in 7Be concentrations in the atmosphere of Kuwait during the period 1994 to 1998

The Beryllium-7 (Be-7) concentrations in the atmosphere of Kuwait, as found by gamma-ray measurements for 243 air filters collected over a five-year period, produced variable values ranging from 0.2 to 14.9 mBq/m(3) with a behavior pattern which has oscillatory characteristics, with increased activities occurring in the summer months of each year. The annual levels of occurrence of 7Be were found to be correlate with the cyclic pattern resulting from the eleven-year temporal variations associated with the solar activity. (C) 2001 Elsevier Science Ltd. All rights reserved.