title: Effect of the tensor force on the charge exchange spin-dipole excitations of 208Pb.
abstract: The charge exchange spin-dipole (SD) excitations of 208Pb are studied by using a fully self-consistent Skyrme Hartree-Fock plus random phase approximation 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 a softening of 1{-} states, but a 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.
authors.affiliation: China Institute of Atomic Energy, 102413 Beijing, China.
authors.forename: C L
authors.initials: CL
authors.lastname: Bai
authors.forename: H Q
authors.initials: HQ
authors.lastname: Zhang
authors.forename: H
authors.initials: H
authors.lastname: Sagawa
authors.forename: X Z
authors.initials: XZ
authors.lastname: Zhang
authors.forename: G
authors.initials: G
authors.lastname: Colò
authors.forename: F R
authors.initials: FR
authors.lastname: Xu