Surface effects on the isovector spin response induced by high energy protons

Abstract
The isovector longitudinal and the transverse spin responses of heavy nuclei, induced by high energy proton scattering, are studied using the surface response technique. The large enhancement of the longitudinal over the transverse spin response obtained in infinite nuclear matter is found to be weakened in the surface response model. The remaining discrepancy from recent proton scattering data can essentially be explained by the isoscalar background.