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    STUDIA PHYSICA - Issue no. 2 / 2011  
         
  Article:   CALIBRATION TECHNIQUES FOR MEASURING THE RADIOACTIVITY OF SOIL SAMPLES BY GAMMA SPECTROMETRY.

Authors:  . 		 
       
         
  Abstract:  In the present paper we studied a method of calibration of a gamma spectrometer for measuring the radioactivity of environmental samples, using the ThO2 in secular equilibrium. A HPGe spectrometer type Canberra and a analysis software Genie 2000 were used in order to aquire the gamma spectra. The gamma spectrum for a sample of artificial soil added with ThO2 was obtained and the efficiency curve was drawn. This measurement method was then applied to a sample of radioactive soil from the uranium mines zone, where radionuclides from the uranium family were identified and the total activity of the samples was determined giving a value of 390.9 Bq/kg.

Keywords: gamma spectrometry, calibration, efficiency curve, natural soil gamma-activity, Marinelli beaker. 

  
         
     
         
         
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