Selective population of states in fission fragments from the 32S+24Mg reaction
Abstract
The symmetric and near-symmetric mass fission yields from the 32S+24Mg reaction have been studied in a particle-particle-γ coincidence measurement. Evidence is presented for a selective population of states in 28Si fragments arising from the symmetric fission of the 56Ni compound nucleus. A statistical-model calculation of the expected strength to specific mutual excitations of the fission fragments is presented and compared to the experimental results. This calculation is found to describe the structures observed at high excitation energy in the fission Q-value spectra quite well. Analysis of the γ-ray spectra indicates, however, that a specific set of states in 28Si, corresponding to a highly deformed prolate band, is populated more strongly than expected based on a purely spin-weighted, statistical decay of the compound nucleus. It is suggested that the population pattern of states in the fission fragments may reflect nuclear structure effects at the point of scission.
- Publication:
-
Physical Review C
- Pub Date:
- February 1994
- DOI:
- 10.1103/PhysRevC.49.1016
- Bibcode:
- 1994PhRvC..49.1016S
- Keywords:
-
- 25.70.Jj;
- 25.70.Gh;
- 24.60.Dr;
- Fusion and fusion-fission reactions;
- Compound nucleus;
- Statistical compound-nucleus reactions