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Radiation Protection Dosimetry Advance Access originally published online on March 24, 2006
Radiation Protection Dosimetry 2006 121(3):325-329; doi:10.1093/rpd/ncl028
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Scientific Notes

Natural radioactivity and evaluation of effective dose equivalent of granites in Turkey

Ahmet Erdal Osmanlioglu*

Turkish Atomic Energy Authority (TAEA), Cekmece Nuclear Research and Training Center, P. K. 1 Ataturk Airport, 34149 Istanbul, Turkey

* Corresponding author: Erdal.Osmanlioglu{at}taek.gov.tr

Received December 16, 2005, amended January 31, 2006, accepted February 7, 2006


  Abstract

Annual effective dose equivalent due to natural gamma radiation from 238U, 232Th and 40K have been evaluated from granites in Turkey. Forty samples were taken for spectrometric analysis. Specific concentrations of 238U, 232Th and 40K in granite samples were determined. Spectroscopy system was used with 1.8 keV (FWHM) coaxial high purity germanium (HPGe) detector. Average values of concentrations of 238U, 232Th and 40K were detected at 15.85, 33.76 and 359 Bq kg–1, respectively. The average value of radon varies from 0.073 to 0.185 Bq m–2 h–1 exhalation depends on the specific concentration of uranium. The dose rate due to this highest activity which have been evaluated by a Monte Carlo transport calculations does not exceed 0.4 mSv a–1.


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