Proton excitation of 1(+) states in 208Pb and a lower limit on the strength of the isoscalar spin-flip part of the effective nucleon-nucleon interaction.

Excitation of 1/sup +/ states in /sup 208/Pb has been studied by 201 MeV proton inelastic scattering. Strength assigned to 1/sup +/ isovector states is found between 6.0 and 8.2 MeV excitation energy and compared with theoretical predictions. From the cross section of the recently discovered 1/sup +/ ''isoscalar'' state at 5.846 MeV, a lower limit is extracted for the volume integral of the total equivalent isoscalar spin-flip part of the nucleon-nucleon interaction.