Journal of Radioanalytical Chemistry

, Volume 45, Issue 2, pp 445–451 | Cite as

Determination of U and Ra in rock samples by gamma-spectrometric method

  • A. Chouak
  • P. Vuister
  • G. Paic
  • M. Berrada
  • J. Csikai
Physical Methods Section


A gamma-spectrometric method independent of radon escape for the determination of U and Ra in rock samples based on the 63 keV and 1001 keV as well as 185 keV lines is described and discussed. A simple experimental procedure is given for the determination of the self-absorption factor. The method has been applied for the determination of uranium and radium in rock samples from Morocco containing uranium between 17.5 wt.% and 0.026 wt.%. The limits of determination, at 95% confidence level and 10% standard deviation, for the 63 keV and 1001 keV lines were found to be 0.075 wt.% and 0.62 wt.%, respectively, using samples of 6 g and chosing 1 h measuring time.


Uranium Radon Rock Sample Linear Calibration Curve Arkose 
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Copyright information

© Akadémiai Kiadó 1978

Authors and Affiliations

  • A. Chouak
    • 1
  • P. Vuister
    • 1
  • G. Paic
    • 1
  • M. Berrada
    • 1
  • J. Csikai
    • 1
  1. 1.Laboratory of Nuclear Physics, Faculty of SciencesUniversity Mohamed V.Rabat(Morocco)

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