Abstract: The amounts of radioactivity in the igneous rocks have been investigated; 63 basalt rock samples were collected from Aden governorate, south of Yemen. The activity concentration of 226Ra, 232Th and 40K were measured using NaI (TI) detector. Along the study area the radium equivalent activities Raeq in Bq/Kg of samples under investigation were found in the range of 51.60to 809.26Bq/Kg with an average value of 237.01Bq/Kg, this value is below the internationally accepted value of 370 Bq/Kg. To estimate the health effects of this natural radioactive composition, the average values of absorbed gamma dose rate D (55 nGyh-1), Indoor and outdoor annual effective dose rates Eied (0.11 mSvy-1), and Eoed (0.03 mSvy-1), External hazard index Hex(0.138) and internal hazard index Hin (0.154), and representative level index Iγr(0.386) have been calculated and found to be higher than the worldwide average values.
Keywords: South Yemen, Absorbed gamma dose, activity concentration, igneous rocks, NaI (TI).
Title: Natural Radioactivity Measurements of Basalt Rocks in Aden governorate, South of Yemen on Gulf of Aden
Author: S. Harb, A. H. El-Kamel, A. M. Zahran, A. Abbady, F.A. Ahmed
International Journal of Mathematics and Physical Sciences Research (IJMPSR)
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