X-RAY-ABSORPTION STUDY OF HIGHLY ORIENTED POLY(TETRAFLUOROETHYLENE) THIN-FILMS

By use of highly oriented films, the polarization dependence of the C 1s and F 1s near-edge absorption spectra of poly(tetrafluoroethylene) has been measured. At le ast at the carbon K edge, good agreement is o btained with the predicted behavior based on a consideration of the on e-dimensional band structure and the effect of symmetry breaking. The findings are also relevant for the assignment of the resonances in lon g chain alkanes, a subject which has recently been somewhat controvers ial.