MASS AND LOW-LYING ENERGY-LEVELS OF CU-69

The (d, He3) reaction on Zn64,66,68,70 was investigated at Ed=23.3 MeV and angular distributions measured for low-lying states. The mass excess of Cu69 is found to be -65.75±0.01 MeV, about 190 keV less stable than tabulated mass values. A partial level scheme for Cu69 based on the systematics of the (d, He3) reaction and the energy levels of the lighter odd mass Cu isotopes is suggested. Spectroscopic factors for proton pickup from the zinc isotopes are also presented. NUCLEAR REACTIONS Zn64,66,68,70(d, He3) Ed=23.3 MeV; measured σ(θ), deduced l DWBA analysis. Cu69 mass measured, level scheme suggested. © 1978 The American Physical Society.