The Fifth Conference “ Nuclear Science and Its Application”, 14-17 October 2008
COMPARISON OF HPGE DETECTOR EFFICIENCY CALIBRATION
TECHNIQUES FOR ANALYSIS OF AIR FILTER SAMPLES IN GAMMA
SPECTROMETRY
A. YÜKSEL
Radioactivity Measurement and Analysis Unit
IAEA, Çekmece Nuclear Research and Training Center, Istanbul, Turkey ayhan.yuksel@taek.gov. tr
Gamma spectrometric analysis o f air filters with HPGe detector is widely used for monitoring and quantification o f radionuclides in air. Efficiency calibration of the gamma spectrometry system, which is used for the activity calculation of the existing radionuclides on the air filter, can be performed by different methods. The total efficiency values obtained for the analysis of an air filter for the same geometry conditions with different techniques, such as relative measurement, direct efficiency calculation and efficiency transfer are compared and discussed in this work. Direct calculation and efficiency transfer methods are performed by the Monte Carlo code, MCNPX. The
Section III. Radiation Ecology
The Fifth Conference “ Nuclear Science and Its Application”, 14-17 October 2008
effects of some experiment conditions such as source in homogeneity and variations in detector structure are also discussed.
