Radioactive disequilibrium in the different rock types in Wadi Wizr, the Eastern Desert of Egypt

被引：15

作者：

Ibrahiem, NM ^{[1
]}

机构：

[1] Egyptian Atom Energy Author, Natl Ctr Nucl Safety & Radiat Control, Cairo 11762, Egypt

来源：

APPLIED RADIATION AND ISOTOPES | 2003年 / 58卷 / 03期

关键词：

Egypt; Eastern Desert; gamma spectrometry; laser fluorometry; X-ray diffraction;

D O I：

10.1016/S0969-8043(02)00242-7

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Remote sensing and radiometric survey techniques in the area between Qusier and Mersa Alam show variation of content of natural radioactivity in Wadi Wizr area, Eastern Desert of Egypt Gamma-ray, and laser fluorimetry were applied to measure the natural radioactivity content in representative content in representative samples from Wadi Wizr. The concentration of Ra-226 ranged from 36 to 661 Bq kg(-1), while the radioactivity ratio between Ra-226/Pb-214 and Pb-214/Bi-214 ranged from 0.7 to 1.4. The activity ratio U-238/Ra-226% was found to be in the range 6.4%-72.2%. A state of disequilibrium between the two radionuclides in the uranium series is clear. The trend of disequilibrium was obvious in all the investigated sites and correlating both radionuclides, U-238/Ra-226 demonstrated the site variation influence. Samples were also analyzed by XRD to reveal their mineral composition. (C) 2003 Published by Elsevier Science Ltd.

引用

页码：385 / 392

页数：8