HPGe virtual point detector for radioactive volume-ring sources

Abstract

Validity of a virtual point detector model implying existence of a point where all interactions virtually occur was investigated for measuring the radioactivity of volume-ring sources. The dependency of the count rates on the distance between the virtual point detector and the detector surface for radioactive volume-ring sources with various radii was studied by MCNP4c simulations and the results were compared with the experimental data. Furthermore, the relationship between the virtual point detector and γ energy for the sources with various radii was investigated. © 2014 IOP Publishing Ltd and Sissa Medialab srl.