title: Evaluation of HPGe detector efficiency for point sources using virtual point detector model.
abstract: The concept of a virtual point detector (VPD) has been developed and validated in the past for Ge(Li) and HPGe detectors. In the present research, a new semi-empirical equation involving photon energy and source-virtual point detector distance for the efficiency of point sources by HPGe detectors is introduced , which is based on the VPD model. The calculated efficiencies for both coaxial and off-axis geometries by this equation are in good agreement with experimental data. The estimated uncertainties are less than 4%.
authors.affiliation: Department of Physics, Faculty of Science, University of Isfahan, Isfahan 81747-73441, Islamic Republic of Iran.
authors.forename: M A
authors.initials: MA
authors.lastname: Mohammadi
authors.forename: M R
authors.initials: MR
authors.lastname: Abdi
authors.forename: M
authors.initials: M
authors.lastname: Kamali
authors.forename: M
authors.initials: M
authors.lastname: Mostajaboddavati
authors.forename: M R
authors.initials: MR
authors.lastname: Zare