Abstract
The experimental form factors for inelastic scattering of electrons from oxygen 8O 8 are compared with the theoretical form factors in order to obtain direct information about the nuclear wave functions with particle-hole configuration mixing. Ground state correlations are included. The levels of odd parity agree well with the experimental results. In most cases the inelastic form factors depend little on the average nuclear potential, but strongly on the configuration amplitude. It is possible to distinguish between collective excitations and single-particle excitations from the different behaviour of longitudinal and transverse form factors. For levels with isobaric spin T = 0 the form factors are always larger with ground state correlations than without. Levels with isobaric spin T = 1 show the opposite behaviour. The most remarkable difference between the evaluation with and without ground state correlations one finds for the octupole levels with T = 0, which are very collective ones.
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