Separable pairing force for relativistic quasiparticle random-phase approximation

Journal Article · Mon Jun 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.064301· OSTI ID:21289901

Yuan, Tian ^[1]; Zhongyu, Ma ^[1]; Ring, Peter ^[2]

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1. China Institute of Atomic Energy, Beijing 102413 (China)
2. Physik Department, Technische Universitaet Muenchen, D-85748 Garching (Germany)

We have introduced a separable pairing force, which was adjusted to reproduce the pairing properties of the Gogny force in nuclear matter. This separable pairing force is able to describe in relativistic Hartree-Bogoliubov (RHB) calculations the pairing properties in the ground state of finite nuclei on almost the same footing as the original Gogny interaction. In this work we investigate excited states using the Relativistic Quasiparticle Random-Phase Approximation (RQRPA) with the same separable pairing force. For consistency the Goldstone modes and the convergence with various cutoff parameters in this version of RQRPA are studied. The first excited 2{sup +} states for the chain of Sn isotopes with Z=50 and the chain of isotones with N=82 isotones are calculated in RQRPA together with the 3{sup -} states of Sn isotopes. By comparing our results with experimental data and with the results of the original Gogny force we find that this simple separable pairing interaction is very successful in depicting the pairing properties of vibrational excitations.

• OSTI ID: 21289901
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CONVERGENCE
EXCITATION
EXCITED STATES
GROUND STATES
HARTREE-FOCK-BOGOLYUBOV THEORY
ISOTONIC NUCLEI
NUCLEAR MATTER
PAIRING INTERACTIONS
RANDOM PHASE APPROXIMATION
RELATIVISTIC RANGE
TIN ISOTOPES