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HK: Fachverband Hadronen und Kerne
HK 27: Nuclear Structure and Dynamics II
HK 27.1: Talk
Tuesday, March 17, 2009, 14:00–14:15, H-ZO 50
Beyond the relativistic mean-field approximation: configuration mixing calculations — •Tamara Niksic1, Dario Vretenar1, and Peter Ring2 — 1Physics Department, University of Zagreb, Croatia — 2Physics Department, Technical University Munich, Germany
The framework of relativistic self-consistent mean-field models is extended to include correlations related to the restoration of broken symmetries and to fluctuations of collective variables. The generator coordinate method is used to perform configuration mixing of angular-momentum and particle-number projected relativistic wave functions. Intrinsic wave functions are generated from the solutions of relativistic mean-field equations, with a constraint on the mass quadrupole moment. The model, currently restricted to axially symmetric shapes, employs a relativistic point-coupling (contact) nucleon-nucleon effective interaction in the particle-hole channel, and a density-independent δ-interaction in the pairing channel. Both global and spectroscopic properties of nuclei are discussed.
In addition, an implementation of the five-dimensional collective Hamiltonian for quadrupole vibrational and rotational degrees of freedom is developed. The parameters are determined by constrained self-consistent mean-field calculation for triaxial shapes. The model is applied to nuclei in the Z=60,62 and 64 with N∼90 region of the periodic chart.