Charge-dependent calculations of single-particle energies in nuclei around 16O with modern nucleon-nucleon interactions
Abstract
The binding energies of the ground states and several excited states related to single-particle and -hole states in nuclei around 16O are calculated taking charge dependence into account. Effective interactions on the particle basis are constructed from modern charge-dependent nucleon-nucleon interactions and the Coulomb force within the framework of the unitary-model-operator approach. Single-particle (-hole) energies are obtained from the energy differences of the binding energies between a particle (hole) state in 17O or 17F (15N or 15O) and the ground state of 16O. The resultant spin-orbit splittings are small for the hole state and large for the particle state in comparison with the experimental values though the differences between the experimental and calculated values are not very large. The charge dependence of the calculated single-particle energies for the ground states are in good agreement with the experimental values. Furthermore, the Thomas-Ehrman shift due to the Coulomb force for the 1s1/2 states in 17O and 17F can be observed.
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