Paper Title
Gamma Radiation Measurements of Naturally Occurring Radioactive in Igneous Rocks and Its Radiological Complications

The concentration of natural radioactivity 226Ra, 232Th and 40K in rock samples collected from southwestern locations in Saudi Arabia was measured by using a high purity germanium (HPGe) detector. The average activity concentrations for 226Ra, 232Th and40K were 35, 31.52 and 843.63Bq kg-1, respectively. The average absorbed dose rate was 70.86 nGyh-1 with a corresponding average annual effective dose 0.09 mSvy-1 . The average radium equivalent activity value was 145.84 Bqkg-1, lower the international limit 370Bqkg-1. The external and internal indices average values were 0.39 and 0.49 , respectively. The average results obtained in this study are lower than the average national and world recommended values, therefore, there is no health risk to the populace of the area. This study provides a baseline map of background radioactivity levels in the Saudi environment and will be used as reference information to assess any changes in the level background due to geological processes