Spin-isospin excitations and beta+/EC half-lives of medium-mass deformed nuclei

Details Spin-isospin excitations and beta+/EC half-lives of medium-mass deformed nuclei Spin-isospin excitations and beta+/EC half-lives of medium-mass deformed nuclei

2001-09-11

arxiv.org/abs/nucl-th/0109028v1

Nucl.Phys. A691 (2001) 631

Physics

Nuclear Physics

Nuclear Theory

16 pages, 5 figures

Scientific paper

10.1016/S0375-9474(01)00565-6

A selfconsistent approach based on a deformed HF+BCS+QRPA method with density-dependent Skyrme forces is used to describe beta+ decay properties in even-even deformed proton rich nuclei. Residual spin-isospin forces are included in the particle-hole and particle-particle channels. The quasiparticle basis contains neutron-neutron and proton-proton pairing correlations in the BCS approach, while neutron-proton pairing interaction is treated as a residual force in QRPA. We discuss the sensitivity of Gamow-Teller strength distributions and beta+/EC half-lives to deformation, pairing and the strength of the particle-particle interaction. The dependence on deformation is also compared to that of spin M1 strength distributions.

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