DECAY OF 9.3-H ZN62 TO CU62

The excited levels of Cu62 have been investigated from the decay of Zn62 with Ge(Li), Si(Li), and standard scintillation counters. γ rays of energy 0.042, 0.245, 0.260, 0.395, 0.505, 0.547, 0.595, and 0.682 MeV have been observed to decay with a half-life of 9.3 h. With the help of γ-γ coincidence study, a consistent scheme of levels at 0.042, 0.287, 0.547, 0.637, and 0.682 MeV in Cu62 has been obtained. The spin and parity assignments of some of the excited levels of Cu62 are discussed. The half-life of the 42-keV level is measured by delayed coincidence to be (2.5±0.1) × 10-9 sec. © 1968 The American Physical Society.