  Cross-section and analyzing power data from (p,p') scattering to the 6-
states at 11.58 and 14.35 MeV in 28Si, taken with energies of 80, 100, 134, and
180 MeV protons, have been analyzed using a distorted wave approximation with
microscopically defined wave functions. The results, taken in conjunction with
an analysis of an M6 electron scattering form factor, suggest that the two
states exhaust respectively, ~50% and ~60% of the strengths of isoscalar and
isovector particle-hole excitations from the ground state. The energy variation
of data also suggests that the non-central components of the effective
interactions at 80 and 100 MeV may need to be enhanced.
