The interpretation of prompt gamma-ray spectra and the prediction of the detection
limits and run times for samples require the knowledge of the detector response function.
The detector system used at the Budapest Prompt-Gamma Activation Analysis facility
consists of an HPGe detector and a Bismuth Germanate Compton suppressor within lead
shielding. The aim of the present study is to characterize this detector with Monte
Carlo calculations and verify the results against measurements of radioactive and
(n, gamma) sources. We have used the Monte Carlo simulation program MCNP-CP to produce
both unsuppressed and suppressed spectra and to study the effect of the detector parts
on the shape of the spectrum. (C) 2009 Elsevier B.V. All rights reserved.