Effect of the tensor force on the charge-exchange spin-dipole excitations of 208Pb

Details Effect of the tensor force on the charge-exchange spin-dipole excitations of 208Pb Effect of the tensor force on the charge-exchange spin-dipole excitations of 208Pb

2010-05-14

arxiv.org/abs/1005.2445v2

Physics

Nuclear Physics

Nuclear Theory

4 pages, 1 figure, 2 tables

Scientific paper

The charge-exchange spin-dipole (SD) excitations of 208Pb are studied by using a fully self-consistent Skyrme Hartree-Fock plus Random Phase Approximation (HF+RPA) formalism which includes the tensor interaction. It is found, for the first time, that the tensor correlations have a unique, multipole-dependent effect on the SD excitations, that is, they produce softening of 1- states, but hardening of 0- and 2- states. This paves the way to a clear assessment of the strength of the tensor terms. We compare our results with a recent measurement, showing that our choice of tensor terms improves the agreement with experiment. The robustness of our results is supported by the analytic form of the tensor matrix elements.

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