Detection efficiency of a BEGe detector using the Monte Carlo method and   a comparison to other calibration methods
  In this paper we model by using the Monte Carlo simulation code PENELOPE [1, 2] a Broad Energy Germanium (BEGe) detector and determine its efficiency. The simulated geometry consists of a point source located close to the detector as well as volume sources with cylindrical geometry. A comparison of the simulation is made to experimental results as well as to analytical calculations. 
N. Stefanakis
physics.ins-det physics.comp-ph