Web-accessible γ‐spectrum simulator with on-line Monte Carlo for voluminous and shielded γ-sources: First results of experimental validation

A modelling approach for a quick and accurate simulation of γ-spectra from volume and shielded sources is described. It is based on the combination of two web-accessible modelling tools, the Easy Monte Carlo (EMC) and the Gamma Spectrum Generator (GSG), which have been recently developed within the European Commission's Nucleonica portal. The high performance of the simulation was achieved by the use of a next-event estimator for the photon flux calculations and an extensive database of the pre-calculated detector responses for the flux-to-pulse height distribution conversion. The paper presents the first results of the experimental validation of this approach performed with a 10% High Purity Germanium (HPGe) detector and shielded/unshielded reference γ-sources.