Energy states in polyvinyl-formal thin films

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Abstract
Electrons with 6 keV energy have been used to probe the energy of states in 100 AA thin films of polyvinyl formal. The electron energy-loss spectra at several angles show plasmon formation. The angular correlations of the scattered and ejected energy-loss electrons have been observed using the (e, 2e) technique with a transmission coplanar scattering geometry. Many states contribute to the (e, 2e) spectrum and with an overall electron resolution of 14.2 eV, states with binding energies of 11, 22, 32, 43, 53, 67, 80 and 93 eV have been seen but not identified. Angular correlations of the states at 22 and 43 eV were made but do not assist with identification of the states. Further measurements with a better electron energy resolution are required.