Relativistic Continuum Quasiparticle Random Phase Approximation in Spherical Nuclei

Details Relativistic Continuum Quasiparticle Random Phase Approximation in Spherical Nuclei Relativistic Continuum Quasiparticle Random Phase Approximation in Spherical Nuclei

2011-03-11

arxiv.org/abs/1103.2332v1

Phys.Rev.C83:044303,2011

Physics

Nuclear Physics

Nuclear Theory

9 pages, 6 figures, accepted for publication in Phys. Pev. C

Scientific paper

10.1103/PhysRevC.83.044303

We have calculated the strength distributions of the dipole response in spherical nuclei, ranging all over the periodic table. The calculations were performed within two microscopic models: the discretized quasiparticle random phase approximation (QRPA) and the quasiparticle continuum RPA, which takes into account the coupling of the single-particle continuum in an exact way. Pairing correlations are treated with the BCS model. In the calculations, two density functionals were used, namely the functional PC-F1 and the functional DD-PC1. Both are based on relativistic point coupling Lagrangians. It is explicitly shown that this model is capable of reproducing the giant as well as the pygmy dipole resonance for open-shell nuclei in a high level of quantitative agreement with the available experimental observations.

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