Gamma-ray spectroscopy of 64Zn and 65Zn and the role of the g{9}/{2} orbital
Abstract
Measurements of γ-ray excitation functions, γ-γ coincidence spectra and γ-ray angular distributions have been made. following the reactions 61Ni(α, n) 64Zn, 62Ni(α, n) 65Zn, 56Fe( 14N, αnp) 64Zn, 56Fe( 12C, 2pn) 65Zn, and 54Fe( 12C, 2p) 64Zn. Among the new levels observed in 64Zn are those at 5624 keV, 6765 keV, 6940 keV, and 6124 keV, the last one with a suggested assignment of (9 -). In 65Zn. ten new levels probably in the positive-parity chain, with spin up to ( {21}/{2}), and a few others, have been found. Comparison of the 65Zn positive-parity levels with the 64Zn ground-state band supports the concept of a single neutron in the g{9}/{2} orbital weakly coupled to a core essentially identical to 64Zn. Many high-spin states in 64Zn itself can be aggregated into bands whose band heads are suggestive of two-quasiparticle states involving one g{9}/{2} excitation.
- Publication:
-
Nuclear Physics A
- Pub Date:
- January 1978
- DOI:
- 10.1016/0375-9474(78)90123-9
- Bibcode:
- 1978NuPhA.295..351N