Assessment of Natural Radioactivity and Radiation Hazard at Qash Amer – El Sela area, South eastern Desert, Egypt.

Abstract

In order to illustrate the assessment of natural radioactivity and radiation hazard at Qash Amir – El Sela area, it is necessary to integrated ground γ-ray spectrometric data, hyper pure germanium (HPGe) γ-ray spectrometer analysis, radon detection and X-ray analysis data, with detailed descriptions. The environmental assessment of Sela using RS-320 portable spectrometer has found eU vary between 15.4 and 3700 (ppm), eTh vary between 6.6 to 40 (ppm) and K ranged from 2.1 to 6.3 (%).The value of eU/eTh ratio is ranged from 0.97 to 251.7. it determines the uranium enrichment in the study area. Forty-seven samples of granites collected from Sela area, Southern Eastern Desert, Egypt have been investigated. The activity concentrations of 238U, 232Th, and 40K radionuclides in the samples were determined by gamma ray spectrometer using HPGe detector with especially designed shield. The concentration of238U, 232Th and 40K (Bq/Kg) has been observed to be ranged from (179 to102451), (17 to 8823) and (467 to 1923) Bq/Kg with mean value6989, 796and 1127 respectively. The main activity concentration of 238U, 232Th and 40K are 212, 23 and 2.7 times that of the international recommended limits 33, 35 and 412(Bq/Kg), respectively. The values of radium equivalent (Bq/Kg), radioactivity level index, external hazard