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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 4:15 |
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Conference: Bucharest University Faculty of Physics 2008 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
A method of efficiency calibration for disk sources in gamma-ray spectrometry
Authors:
D. RADU(1), D. STANGA(1), O. SIMA(2)
Affiliation:
(1) Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania
(2) University of Bucharest, Department of Atomic and Nuclear Physics, Bucharest, Romania
E-mail
radu.daniela@yahoo.co.uk
osima@pcnet.pcnet.ro
Keywords:
gamma-ray spectrometry, detector characterization, efficiency calibration
Abstract:
In order to perform an efficiency calibration for different measurement geometries a good knowledge of the parameters characterizing the detector is always necessary as these greatly influence the results of the study. The quality of the results of gamma spectrometry measurement depends directly on the accuracy of the detection efficiency in the specific measurement conditions. Experimental calibration is restricted to several measurement geometries and can not be applied directly to all measurement configurations. In this work an approach using efficiencies measured with point sources combined with theoretical procedures is applied for obtaining the peak efficiency ε(E) for disk sources measured with a NaI(Tl) detector. Coincidence summing effects are evaluated using GESPECOR and are used to correct the experimental values of the efficiencies. The resulting efficiencies were compared with predictions of the ETNA (Efficiency Transfer for Nuclide Activity measurements) software. The efficiency curves obtained in this way were applied to the measurement of samples from the decommissioning of the VVR-S Reactor.
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