Purpose The present work deals with the natural radioactivity levels of basement rocks from Gabel Abu El-Hassan in the North Eastern Desert of Egypt.Methods The activity concentrations of 226Ra,232Th and 40K in rock s...Purpose The present work deals with the natural radioactivity levels of basement rocks from Gabel Abu El-Hassan in the North Eastern Desert of Egypt.Methods The activity concentrations of 226Ra,232Th and 40K in rock samples were measured using a gamma-ray spectrometry with an HPGe detector.Landsat Enhanced Thematic Mapper Plus(ETM+)data were processed and interpreted to create rock forming radioactive map.Results and conclusion The activity concentrations of 226Ra,232Th and 40K varied from 28.2±9.4 to 259.6±38.6 Bq/kg,37.9±9.9 to 297.4±54.6 Bq/kg and 487.0±73.4 to 5514.6±786.0 Bq/kg,respectively.The radiological hazard indices(gamma index),the annual effective dose rate and excess life-time cancer risk were estimated to assess the radiological hazards due to the use of rock samples as building material.Remote sensing data were also used to integrate between radioactive analysis and Landsat-7(ETM+)data processing to detect radioactive anomalies and to identify the uraniferous alteration zones in Abu El-Hassan area.展开更多
文摘Purpose The present work deals with the natural radioactivity levels of basement rocks from Gabel Abu El-Hassan in the North Eastern Desert of Egypt.Methods The activity concentrations of 226Ra,232Th and 40K in rock samples were measured using a gamma-ray spectrometry with an HPGe detector.Landsat Enhanced Thematic Mapper Plus(ETM+)data were processed and interpreted to create rock forming radioactive map.Results and conclusion The activity concentrations of 226Ra,232Th and 40K varied from 28.2±9.4 to 259.6±38.6 Bq/kg,37.9±9.9 to 297.4±54.6 Bq/kg and 487.0±73.4 to 5514.6±786.0 Bq/kg,respectively.The radiological hazard indices(gamma index),the annual effective dose rate and excess life-time cancer risk were estimated to assess the radiological hazards due to the use of rock samples as building material.Remote sensing data were also used to integrate between radioactive analysis and Landsat-7(ETM+)data processing to detect radioactive anomalies and to identify the uraniferous alteration zones in Abu El-Hassan area.
