Open AccessThe dependence of Ge detectors efficiency on the density of the samples in gamma-ray spectrometry
Author(s) -
Ivana Vukašinović,
Dragana Todorović,
Dragana Popovič
Publication year - 2007
Publication title -
nuclear technology and radiation protection
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 16
eISSN - 1452-8185
pISSN - 1451-3994
DOI - 10.2298/ntrp0702058v
Subject(s) - detector , range (aeronautics) , mass spectrometry , materials science , analytical chemistry (journal) , gamma ray spectrometry , semiconductor detector , radiochemistry , chemistry , physics , optics , chromatography , composite material
The effect of the density of environmental samples on the counting efficiency of Ge detectors used in gamma-spectrometry was studied. The dependence εff(ρ) was determined for two HPGe detectors (relative efficiencies 18% and 20%) using five radioactive standard reference materials (silicone resins, epoxy resin, milk powder, soil) with different matrix densities (0.45-1.22 g/cm3) in Marinelli beakers (V = 500 cm3). The dependence of efficiency vs. density was found to be linear and the regression parameters for energies in the range of 60-2000 keV were determined, too. The effect of variation in density on the counting efficiency of Ge detectors is dominant in the range of lower energies (60-600 keV) and de creases with energies in the higher energy range