Abstract
Using the reaction and the coincidence recoil distance Doppler shift technique, we determined picosecond lifetimes of high-spin states in The positive-parity yrast and yrare cascades evidence the competition and interplay of the two proton holes in the orbit and four neutrons in the and orbits, outside the core. At positive parity, this interplay leads to multiplets of states in the spin range some of which are connected by very weak transitions. At higher spins, spin-aligned proton holes and neutrons lead to magnetic rotation. Energies and transition strengths when compared with the predictions of several shell model calculations reveal the high sensitivity on the model parameters.
- Received 21 November 2000
DOI:https://doi.org/10.1103/PhysRevC.63.054304
©2001 American Physical Society