A radioactive (=1600 yr) target was used to study the (α,tAc and He,dAc reactions at an incident energy of 30 MeV for both the α and particles. These measurements have confirmed most levels observed in earlier decay-scheme studies, and give evidence for 11 additional levels. Several of the new levels were used in the tentative assignment of two bands. The experimental data are compared with results from the Nilsson model and a nonadiabatic, rigid, reflection-asymmetric rotor (octupole) model. Although the order and spacing of levels in this mass region can be explained better by models that include an octupole deformation, the spectroscopic strengths in are in better agreement with those calculated for the reflection-symmetric potential.
- Received 30 October 1987
- Published in the issue dated April 1988
© 1988 The American Physical Society