## Abstract

Lifetimes of high-spin states in two [Formula Presented] bands and one [Formula Presented] band in [Formula Presented] have been measured using the Doppler shift attenuation method in an experiment performed using the [Formula Presented] reaction with the GAMMASPHERE array. Experimental total angular momenta and reduced transition strengths for both [Formula Presented] bands were compared with tilted axis cranking (shears mechanism) predictions and the [Formula Presented] band with principal axis cranking predictions, based on configurations involving two proton [Formula Presented] holes and one or three valence quasineutrons from the [Formula Presented] and mixed [Formula Presented] orbitals. Good overall agreement for angular momentum versus rotational frequency has been observed in each case. The [Formula Presented] band is shown to have a large [Formula Presented] ratio suggestive of antimagnetic rotation. Additionally, both dipole bands show a decreasing trend in [Formula Presented] strength as a function of spin, a feature of the shears mechanism. The experimental results are also compared with a semiclassical model that employs effective interactions between the proton holes and neutrons as an alternate interpretation for the shears mechanism.

Original language | English |
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Number of pages | 1 |

Journal | Physical Review C - Nuclear Physics |

Volume | 61 |

Issue number | 3 |

DOIs | |

Publication status | Published - 1 Jan 2000 |