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Radiation Protection Dosimetry Advance Access published online on August 15, 2006
Radiation Protection Dosimetry, doi:10.1093/rpd/ncl103
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
Received May 13, 2006
Revised July 1, 2006
Accepted July 9, 2006

SCIENTIFIC AND TECHNICAL PAPER

GAMMA-RAY SPECTROSCOPIC ANALYSIS OF SELECTED SAMPLES FROM NILE RIVER SEDIMENTS IN UPPER EGYPT

M. A. M. Uosif 1 *

1 Physics Department, Faculty of Science, AL-Azhar University, Assuit, Egypt

* To whom correspondence should be addressed.
M. A. M. Uosif, E-mail: Dr_Mohamed_Amin{at}lycos.com


  Abstract

Selected sedimentary samples from different locations on the east and west banks of the Nile River in Upper Egypt were analysed by natural radioactivity measurements to detect the presence of radioactive elements. From the analysis of radiations from 226Ra, 232Th and 40K isotopes, the samples were found to contain Ra, Th and K in concentrations up to 52 ± 7.3, 76.2 ± 6.2 and 351.9 ± 17.6 Bq kg-1, respectively. The absorbed dose rate in air was found to be in the range of 9.6-84.8 nGyh-1. The representative external hazard index values for the corresponding samples were also estimated.


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