ABSOLUTE OSCILLATOR-STRENGTHS (5-63 EV) FOR PHOTOABSORPTION AND IONIC FRAGMENTATION OF SF6

Dipole oscillator strengths (cross sections) for photoabsorption and photofragmentation of SF6 have been obtained over a range of energies up to an equivalent photon energy of 63 eV, from electron-ion coincidence measurements. The photoionisation efficiency from the ionisation threshold to 63 eV is reported. These results have been combined with photoionisation branching ratios for the six lowest energy states of SF6+ to obtain a model for the dipole-induced fragmentation of valence-ionised SF6. The relative contributions of dissociative and non-dissociative double ionisation have also been investigated.