Measurements of Partial γ-ray Cross Sections in 60Ni([formula omitted]) Reactions

Abstract

Absolute partial cross sections for production of discrete γ-rays using 60Ni(n,xnypzαγ) reactions with x≤3, y≤2 and z≤4 in a total of 20 reaction channels were measured. The data were taken using the GEANIE spectrometer comprised of 20 high-purity Ge detectors with BGO escape-suppression shields. The broad-spectrum pulsed neutron beam of the Los Alamos Neutron Science Center's (LANSCE) WNR facility provided neutrons in the energy range from 0.2 to 300 MeV. The time-of-flight technique was used to determine the incident neutron energies. Partial γ-ray cross sections have been measured for a total of 59 transitions and for neutron energies 1 MeV <En< 300 MeV. Hauser-Feshbach theoretical calculations with an improved cluster emission model in the pre-equilibrium process were performed up to En = 30 MeV and are compared to the experimental results.