Experience with a Compton-suppressed spectrometer (heavy ion, xn) reactions

A Compton-suppressed spectrometer consisting of a Ge(Li) detector and a NaI(T1) shield, in the asymmetrical arrangment, has been used for both singles and coincidence γ-ray measurements in (16O,xn) reactions leading to deformed nuclei in the osmium region. The rejection of peak events because of true coincidences between γ-ray or neutron events in the NaI(T1) shield, and the Ge(Li) detector, has been measured for typical cases. The contributions to this peak rejection, and their sensitivity to multiplicity are discussed. (orig.)