Energy and efficiency calibration of an array of six Euroball Cluster detectors used for beta-decay studies

摘要

The use of an array of 6 euroball cluster detectors, i.e. 42 large-volume germanium detectors, for beta-decay studies is described. The solid angle with respect to a source placed in the center of the array amounts to 65% of 4(pi) sr. The total photo-peak efficiency for 1.33 MeV (gamma)-rays is 10.2(5)%, without ''adding back'' the Compton-scattered events. For this (gamma)-ray energy, the energy resolution of the entire setup is 2.8 keV. The performance of the array up to (gamma)-ray energies of 8 MeV is discussed, and alternative ways of determining the photo-peak efficiency are presented. (orig.) 13 refs.