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

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

Izvornik
Physical review. C (2469-9985) 101 (2020), 6; 064301, 10

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
collective Hamiltonian

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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