Gamma Radiation from Inelastic Scattering of Fast Neutrons by Isotopes of Tellurium, Nickel, and Copper

Gamma radiation from 4.4±0.1 Mev neutron bombardment of separated isotopes was observed with a single crystal NaI(Tl) spectrometer. Gamma rays assigned to inelastic scattering are (energies in Mev): ${\mathrm{Te}}^{126}$, 0.68±0.02, 1.38±0.04; ${\mathrm{Te}}^{128}$, 0.76±0.02; ${\mathrm{Te}}^{130}$, 0.83±0.02; ${\mathrm{Ni}}^{58}$, 1.01±0.01, 1.46±0.02; ${\mathrm{Cu}}^{63}$, 0.65±0.01, 0.97±0.01, 1.34±0.03, 1.43±0.05; ${\mathrm{Cu}}^{65}$, 1.12±0.02. A 1.35±0.02 Mev gamma ray is assigned to ${\mathrm{Ni}}^{60}$ by elimination. Relative yields of the gamma rays are given and their assignment to various excited states of the target nuclei is discussed.