Second Backbend in the Mass A ~ 180 Region

Details Second Backbend in the Mass A ~ 180 Region Second Backbend in the Mass A ~ 180 Region

1998-11-13

arxiv.org/abs/nucl-th/9811049v1

Phys.Rev. C59 (1999) 2537-2540

Physics

Nuclear Physics

Nuclear Theory

13 pages, 4 ps figures

Scientific paper

10.1103/PhysRevC.59.2537

Within the framework of selfconsistent cranked Hartree-Fock- Bogoliubov theory(one-dimensional) we predict second backbend in the yrast line of Os-182 at $I \approx 40 $, which is even sharper than the first one observed experimentally at $I \approx 14 $. Around such a high spin the structure becomes multi-quasiparticle type, but the main source of this strong discontinuity is a sudden large alignment of i_13/2 proton orbitals along the rotation axis followed soon by the alignment of j_15/2 neutron orbitals. This leads to drastic structural changes at such high spins. When experimentally confirmed, this will be observed for the first time in this mass region, and will be at the highest spin so far.

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