Tzika Faidra, Kontogeorgakos Dimitrios, Vasilopoulou Theodora, Stamatelatos Ion E
Institute of Nuclear Technology & Radiation Protection, NCSR Demokritos, Attikis, Greece.
Appl Radiat Isot. 2010 Jul-Aug;68(7-8):1441-4. doi: 10.1016/j.apradiso.2009.11.023. Epub 2009 Nov 17.
A MCNP model was developed for the efficiency calibration of an in situ gamma ray spectrometry system based on a high purity germanium (HPGe) detector. The detector active crystal volume was adjusted semi-empirically against experimental measurements. Calculated full energy peak efficiency curves, over the photon energy range between 50 keV and 5 MeV, are presented for surface and slab source configurations. The effect of different collimator apertures and the contribution of different HPGe crystal regions in the detector response are also shown.
