An Exactly Solvable Supersymmetric Model of Semimagic Nuclei

Details An Exactly Solvable Supersymmetric Model of Semimagic Nuclei An Exactly Solvable Supersymmetric Model of Semimagic Nuclei

2008-08-04

arxiv.org/abs/0808.0405v1

AIPConf.Proc.1072:82-87,2008

Physics

Nuclear Physics

Nuclear Theory

Talk given at the International Conference on Nuclear Physics and Astrophysics: From Stable Beams to Exotic Nuclei, Cappadocia

Scientific paper

10.1063/1.3039869

A simple model of nucleons coupled to angular momentum zero (s-pairs) occupying the valance shell of a semi-magic nuclei is considered. The model has a separable, orbit dependent pairing interaction which dominates over the kinetic term. It is shown that such an interaction leads to an exactly solvable model whose (0+) eigenstates and energies can be computed very easily with the help of the algebraic Bethe ansatz method. It is also shown that the model has a supersymmetry which connects the spectra of some semimagic nuclei. The results obtained from this model for the semimagic Ni isotopes from 58Ni to 68Ni are given. In addition, a new and easier technique for calculating the energy eigenvalues from the Bethe ansatz equations is also presented.

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