Abstract
Low-lying low-spin collective states in even and were investigated using in-beam and off-beam γ-ray and conversion-electron spectroscopy. New spin assignments and decay branching ratios for the levels in , , , and were obtained. The present results essentially complement the level systematics from to . From the new data, it is inferred that two sets of low-lying states having different excitation characteristics cross between and . No corresponding crossing occurs on the neutron deficient side. New evidence for the existence of the proton-intruder states has been found.
- Received 15 January 1991
DOI:https://doi.org/10.1103/PhysRevC.45.640
©1992 American Physical Society