Abstract
Alpha-alpha coincidence measurements have been made in the reaction O,α→α at the bombarding energy of EO)=63 MeV corresponding to the resonance in the O system at =26.9 MeV leading to the compound nuclear state at 43.7 MeV in . The coincidence alphas are detected, one at 0° to the beam and the other at 20° to 80° in steps of 10°. The spins of the states in at 20.2 and 21.4 MeV are fed strongly at this resonance are inferred to be J≥8 from the branching of these states to the states in the ground state band of . From the result it is deduced that these states of do not correspond to the near Coulomb barrier resonances in the C system. In addition, the coincidence measurements also lead to the result that the states of in the 20–22 MeV region fed at the resonance preferentially decay to the eight-particle–four-hole states of near 7.2 MeV. These results establish the structural connection of highly deformed shape isomeric states in the region of ε=1.17 to 1.35 and γ=50° to 60° in , , and expected from the Nilsson-Strutinsky calculations of Leander and Larsson.
- Received 5 April 1994
DOI:https://doi.org/10.1103/PhysRevC.50.1535
©1994 American Physical Society