Natural Radioactivity of soil samples from some areas of Aden governorate, south of Yemen Region

The natural radioactivity in soil mainly comes from the uranium and thorium decay series and potassium (UNSCEAR, 2000). Obviously the actual level of radiation caused by the radionuclide content of rocks and soil varies widely from place to place and the actual background contribution to the external gamma dose rate at a given location can be determined only by measurement. Thus, the dose rate depends on the geological location (Martin and Harbinson). Measurement of natural background radiation and radioactivity in soil has been carried out in many countries to establish the baseline data of natural radiation levels (Ibrahiem et al., 1993). ISSN: 2319-7706 Volume 3 Number 11 (2014) pp. 640-648 http://www.ijcmas.com