Protons from Zn64 and Zn66 Bombarded with 14.1 MeV Neutrons

Abstract

Energy spectra and angular distributions were measured for protons emitted from Zn 64 and Zn 66 bombarded with 141.1 MeV neutrons. Any of level density formulae fits equally well the energy spectrum for backward angles. The constant temperature formula gives 1.22±0.07 MeV and 1.35±0.05 MeV as the nuclear temperatures of Cu 64 and Cu 66 respectively. Using the Lang level density formula, the level density parameters for Cu 64 and Cu 66 are given as 8.26±0.78 MeV -1 and 5.39±0.56 MeV -1 respectively. The proton angular distributions are concave and symmetric around 90°. Anisotropy is greater for higher energy protons. The anisotropy of lower-energy protons emitted through the ( n , p ) reaction is found to be comparable to the anisotropy of those emitted through the ( n , n p ) reaction. The cross sections for the ( n , p ) and ( n , n p ) reactions for Zn 64 through compound process are 127±9 mb and 169±26 mb and those for Zn 66 30.0±1.1 mb and 40.5±8.3 mb respectively. The direct ( n , p ) reaction for Zn...