ELASTIC-SCATTERING AND VIBRATIONAL-EXCITATION CROSS-SECTIONS FOR ELECTRON COLLISIONS WITH C2F6

Absolute elastic cross sections for e-C2F6 collisions have been measur ed for impact energies of 2 to 100 eV and scattering angles from 10 to 130 degrees. From these, the integrated and momentum transfer cross s ections were obtained by extrapolation and numerical integration. Ener gy loss spectra were measured for vibrational excitation. The vibratio nal excitation functions show resonances at 4.3 eV and 8.5 eV. By deco mposition of the loss spectra and symmetry analysis according to angul ar correlation theory, the resonances have been assigned to a temporar y trapping of the electrons in the a(2u) (4.3 eV) and e(u) (8.5 eV) an tibonding orbitals of the molecule.