Abstract
Thin atactic polystyrene films were studied by backscattering of low-energy electrons. Energy losses corresponding to the excitation in the film of triplet and singlet electronic excitation of the pendant groups are observed. The variation of the corresponding cross sections with incident electron energy are in good agreement with theoretical calculations for benzene. The variation of the backscattered intensity integrated over electron energy in a given direction, yields a ionization threshold of about 7 eV and shows evidence for structure of the valence band.
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