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
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