CALCULATION OF RADIOACTIVITY LEVELS FOR VARIOUS SOIL SAMPLES OF NEIGHBORHOOD AL RAHMAH (IRAQ)SHATHA F. ALHOUS, LUBNA A. ALASADI, SHAYMAA AWAD KADHIM, HAYDER H.HUSSAIN AND RUSUL MOHAMMED ALKHAFAJI
The study of radioactive nuclei concentrations in soils is a very important topic due to the contribution of some factors in increasing these concentrations. Where the nucleus transition to food and then the human and endanger their life. Where taken 15 samples of soils from Al Rahmah district, where a gamma-ray spectrometer system connected with the NaI(TI) detector was used to measure the specific activity of the 226Ra, 232Th and 40K nuclei, the specific activity values varied from (0.526 -5.385) Bq.kg-1 with mean (2.193 Bq.kg-1) for 226Ra,(0.56 -5.29) Bq.kg-1 with average (2.95 Bq.kg-1) for 232Th and (209.239-990.387) Bq.kg-1 with mean (598.714 Bq.kg-1) for 40K, respectively. Specific activity values showed that there was only a significant increase in 40K concentrations, while that the difference between the rate of Thorium and Radium concentrations was little. External and internal hazard indices, outdoor and indoor absorbed doses and Radium equivalent activity and total annual effective dose which were below the internationally recommended limits. The excess life-time cancer risk (ELCR) was ( 0.717*10-3 ) which compares with the worldwide value (1.45*10-3), this is the first study in this region and can be considered as a baseline for future studies in this area.