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Coupling of shape and pairing vibrations in a collective Hamiltonian based on nuclear energy density functionals (CROSBI ID 289367)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Xiang, J. ; Li, Z. P. ; Nikšić, T. ; Vretenar, D. ; Long, W. H. Coupling of shape and pairing vibrations in a collective Hamiltonian based on nuclear energy density functionals // Physical review. C, 101 (2020), 6; 064301, 10. doi: 10.1103/physrevc.101.064301

Podaci o odgovornosti

Xiang, J. ; Li, Z. P. ; Nikšić, T. ; Vretenar, D. ; Long, W. H.

engleski

Coupling of shape and pairing vibrations in a collective Hamiltonian based on nuclear energy density functionals

The quadrupole collective Hamiltonian, based on relativistic energy density functionals, is extended to include a pairing collective coordinate. In addition to quadrupole shape vibrations and rotations, the model describes pairing vibrations and the coupling between shape and pairing degrees of freedom. The parameters of the collective Hamiltonian are determined by constrained self-consistent relativistic mean- field plus BardeenCooper-Schrieffer (RMF+BCS) calculations in the space of intrinsic shape and pairing deformations. The effect of coupling between shape and pairing degrees of freedom is analyzed in a study of low-energy spectra and transition rates of four axially symmetric N = 92 rare-earth isotones. When compared to results obtained with the standard quadrupole collective Hamiltonian, the inclusion of dynamical pairing increases the moment of inertia, lowers the energies of excited 0+ states, and reduces the E0 transition strengths, in better agreement with data.

collective Hamiltonian

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Podaci o izdanju

101 (6)

2020.

064301

10

objavljeno

2469-9985

2469-9993

10.1103/physrevc.101.064301

Povezanost rada

Fizika

Poveznice
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