Neutron-induced peaks in Ge detectors from evaporation neutrons

We have studied the peak shapes at 596 and 691 keV resulting from fast neutron interactions inside germanium detectors. We have used neutrons from a ²⁵²Cf source, as well as from the ²⁸Si(μ ^-, nv), and ²⁰⁹Bi(π ^-, xn) reactions to compare the peaks and to check for a dependence of peak shape on the incoming neutron energy. In our investigation, no difference between these three measurements has been observed. In a comparison of these peak shapes with other studies, we found similar results to ours except for those measurements using monoenergetic neutrons in which a significant variation with neutron energy has been observed.