Spin-Dipole Strengths and Neutron Skin Thickness of 90Zr, 132Sn, 208Pb

The strength distributions of charge exchange spin-dipole excitations are calculated in the continuum quasiparticle random-phase approximation based on the Fayans density functional with modified isovector part. An impact of the isovector parameter h(2)(-) of the DF3-f functional on the strength functions of charge-exchange spin-dipole excitations (0(-),1(-),2(-))are studied for Pb-208, Sn-132 and Zr-90. The sum rules are calculated using both ground state radii and direct integration of the total SD strength distributions. A comparison with the experimental SD sum rule in 90Zr gives one a possibility to check previously estimated h(2)(- )values which described well the recent combined estimate for Delta R(np )in (208)Pband corresponding equation of state parameters-symmetry energy J(0 )= J((rho 0))and a slope parameter L-0 = L(rho(0)).