Development and Validation of Fast and Accurate Simulation Tools of full Gamma Spectra from Shielded and Unshielded Uranium Samples

g-Spectrometry is a basic and widely applied method in nuclear security and nuclear safeguards areas. For addressing the growing needs in education and training, in research and development as well as in practical g-spectrometry in these areas, MonteCarlo based web-accessible g-spectrum modelling tools have been developed for the European Commission¿s Nucleonica portal at www.nucleonica.net. A recent validation study has demonstrated a good performance of the implemented simulation approach for modelling realistic g-spectra from shielded and unshielded point-like sources. In the present work this approach has been further tested with the use of a 0.2 kg voluminous 4.46 wt% enriched uranium reference material and a portable10% HP Ge detector. The simulations for shielded and unshielded measurement conditions revealed a good agreement with the experimentally acquired g-spectra, both for the detection efficiency values and for the overall spectrum shape and intensity in the energy range up to2.6MeV.

BERLIZOV Andrey;  MAYER Klaus; 

2010-07-16

PERGAMON-ELSEVIER SCIENCE LTD

JRC56415

0969-8043,   

www.elsevier.com/locate/apradiso,    https://publications.jrc.ec.europa.eu/repository/handle/JRC56415,   

10.1016/j.apradiso.2010.03.019,