Absorption Spectrum of SF6 in the Far Ultraviolet by Electron Impact

Measurements of forward inelastic scattering of 400-eV electrons from SF6 were made and used to derive relative ultraviolet-absorption cross sections. The relative values were normalized to an ultraviolet-absorption measurement at 23.00 eV. Agreement with additional uv measurements at 21.2 and 17.6 eV was excellent. Oscillator strengths for three absorption bands between 10 and 15 eV, as derived from the electron-scattering measurements, are in fair agreement with the corresponding values measured by uv absorption. The total oscillator strength for excitations up to 32 eV is found to be 15.3.