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

Osmanlioglu A. E.

RADIATION PROTECTION DOSIMETRY, vol.121, no.3, pp.325-329, 2006 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 121 Issue: 3
  • Publication Date: 2006
  • Doi Number: 10.1093/rpd/ncl028
  • Page Numbers: pp.325-329


Annual effective dose equivalent due to natural gamma radiation from U-238, Th-232 and K-40 have been evaluated from granites in Turkey. Forty samples were taken for spectrometric analysis. Specific concentrations of U-238, Th-232 and K-40 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 U-238, Th-232 and K-40 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).