The γ-decay from the warm rotation in the transition region between order and chaos is studied in the superdeformed (SD) nuclei 151 Tb and 196 Pb, using the EUROBALL IV array. A number of observables, testing the decay dynamics in the SD well, are compared with predictions from a Monte Carlo simulation of the γ-decay based on microscopic calculations of discrete levels and decay probabilities. Agreement with the data is found only assuming an enhancement of the B(E1) strength around 1 MeV by a factor of 10-100, which is consistent with the evidence for octupole vibrations in both mass regions. The work shows the relevance of γ-spectroscopy in the order-to-chaos regime to highlight specific nuclear structure effects.
|Number of pages||1|
|Journal||Acta Physica Polonica B|
|Publication status||Published - Mar 1 2009|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)