Fine structure of charge-exchange spin-dipole excitations in 16O
The charge-exchange spin-dipole (SD) excitations for both (p,n) and (n,p) channels in 16O are investigated in the fully self-consistent random phase approximation based on the covariant density functional theory. The fine structure of SD excitations in the most up-to-date 16O(p,n)16F experiment is excellently reproduced without any readjustment in the functional. The SD excitations are characterized by the delicate balance between the σ- and ω-meson fields via the exchange terms. The fine structure of SD excitations for the 16O(n,p)16N channel is predicted for future experiments. © 2012 American Physical Society.