title: Extension of the efficiency calibration of germanium detectors using the GESPECOR software.
abstract: To avoid losses due to coincidence summing, the efficiency calibration of gamma-spectrometers is often carried out by means of radionuclides emitting only one photon during a single decay. Calibration with this kind of radionuclides has, however the disadvantage that the energy range of the gamma rays (46 keV<E<1115 keV) is limited. Coincidence-summing corrections can be calculated with the Monte Carlo program Germanium Spectrometry Correction for multi gamma radionuclides which emit photons with energies above this range. The efficiency curve as a function of energy can therefore be extended up to 2.7 MeV with uncertainties below 4%.
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany. dirk.arnold@ptb.de
authors.forename: Dirk
authors.initials: D
authors.lastname: Arnold
authors.forename: Octavian
authors.initials: O
authors.lastname: Sima