| NUKLEONIKA 2011, 56(1):23-28
SELF-ABSORPTION CORRECTION AND EFFICIENCY CALIBRATION
FOR RADIOACTIVITY MEASUREMENT OF ENVIRONMENTAL SAMPLES
BY GAMMA-RAY SPECTROMETRY
Ryszard Misiak1, Roman Hajduk1, Marcin Stobiński1, Mirosław Bartyzel1,
Katarzyna Szarłowicz1,2, Barbara Kubica 1,3
1 Division of Applications of Physics
and Interdisciplinary Research,
The Henryk Niewodniczański Institute of Nuclear
Physics, Polish Academy of Sciences,
152 Radzikowskiego Str., 31-342 Kraków, Poland
2 Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University,
3 Ingardena Str., 30-060 Kraków, Poland
3 Faculty of Fuels and Energy, AGH University of Science and Technology,
30 A. Mickiewicza Ave., 30-059 Kraków, Poland
In this work empirical functions which relate the full-energy-peak-efficiency with sample height, energy, matrix composition and bulk density for voluminal samples in a cylindrical counting geometry were found. Accurate determination of the radioactivity of gamma-emitting radionuclides in environmental samples requires taking into account self-absorption. For the obtained self-absorption correction factor, a direct transmission method was chosen. Finally, this paper proposes a simple correlation between the self-absorption correction factor and the bulk density and height of the measured sample for a given energy.
Close X |