title: Using standard calibrated geometries to characterize a coaxial high purity germanium gamma detector for Monte Carlo simulations.
abstract: A detector model optimization procedure based on matching Monte Carlo simulations with measurements for two experimentally calibrated sample geometries which are frequently used in radioactivity measurement laboratories results in relative agreement within 5% between simulated and measured efficiencies for a high purity germanium detector. The optimization procedure indicated that the increase in dead layer thickness is largely responsible for a detector efficiency decrease in time. The optimized detector model allows Monte Carlo efficiency calibration for all other samples of which the geometry and bulk composition is known. The presented method is a competitive and economic alternative to more elaborate detector scanning methods and results in a comparable accuracy.
authors.affiliation: KVI-Center for Advanced Radiation Technology (KVI-CART), University of Groningen, Zernikelaan 25, 9747 AA Groningen, The Netherlands.
authors.forename: E R
authors.initials: ER
authors.lastname: van der Graaf
authors.affiliation: KVI-Center for Advanced Radiation Technology (KVI-CART), University of Groningen, Zernikelaan 25, 9747 AA Groningen, The Netherlands.
authors.forename: P
authors.initials: P
authors.lastname: Dendooven
authors.affiliation: KVI-Center for Advanced Radiation Technology (KVI-CART), University of Groningen, Zernikelaan 25, 9747 AA Groningen, The Netherlands.
authors.forename: S
authors.initials: S
authors.lastname: Brandenburg