Abstract
The transitional nucleus has been studied by the Si,2p2n) reaction, with γ-γ coincidence, angular correlation, Doppler-shift-attenuation and measurements. Band structures exhibiting strongly staggered M1 transition rates were found at high spins, with large B(M1) values but no significant E2 collectivity. The unusual behavior of this nucleus is interpreted within the framework of an interacting boson model incorporating two broken boson pairs. This new model for high-spin states is seen to be remarkably successful in describing the electromagnetic decay properties in the four-quasiparticle regime.
- Received 12 August 1991
DOI:https://doi.org/10.1103/PhysRevLett.67.2950
©1991 American Physical Society