Variations in radioactivity of phosphate rocks from different sites in Central Eastern Desert of Upper Egypt  

作　　者：AMEl-Arabi AMMYousef 

出　　处：《Nuclear Science and Techniques》2002年第4期193-201,共9页核技术（英文）

摘　　要：Natural radionuclides in the phosphate rock samples collected from Wadi Batur,Wadi Hegaza and Gabal Abu Had at Eastern Desert were determined using a high resolution γ-ray spectrometer.The experimental results concerning ^226Ra,232Th and their daughters are presented.Analyses of the measured spectra show that ^226Ra is distinguished with remarkable activities with average values ranging from 22.4 to 558Bq/kg,while ^232Th activity concentration is in the range of 9.7 to 92.8Bq/kg.The results of the analyses were found to be in a good agreement with the data obtained by others.Natural radionuclides in the phosphate rock samples collected from Wadi Batur, Wadi Hegaza and Gabal Abu Had at Eastern Desert were determined using a high resolution γ-ray spectrometer. The experimental results concerning 226R,a, 232Th and their daughters are presented. Analyses of the measured spectra show that 226Ra is distinguished with remarkable activities with average values ranging from 22.4 to 558 Bq/kg, while 232Th activity concentration is in the range of 9.7 to 92.8 Bq/kg. The results of the analyses were found to be in a good agreement with the data obtained by others.

关 键 词：磷酸岩 天然放射性核素 226RA ^232Th 

分 类 号：P619.1[天文地球—矿床学]