Kinetic energy distribution and anisotropy of fragment ions from SF6 by photoexcitation of a sulfur 2p-electron

The kinetic energy (KE) distribution and asymmetry parameter β have been studied for photofragmentation of SF6 near the sulfur 2p ionization edges at 170–208 eV. The relative ion yield at KE > 5 eV is higher in the post-edge than in the pre-edge region, whereas β is lower by ∼0.06 in the post-edge region. These results are ascribed to LVV Auger decay occurring above the edges. At KE > 2 eV the distribution curve for core excitation to the (2t1u)−1(6a1g)1 state resembles that for valence-electron ionization, suggesting participation of shake-up satellite states in production of fast F+ ions.