Sulphur hexaflouride: low energy (e,2e) experiments and molecular three-body distorted wave theory

Nixon, Kate L.; Murray, Andrew J.; Chaluvadi, H.; Ning, C. G.; Colgan, James and Madison, Don H. (2016). Sulphur hexaflouride: low energy (e,2e) experiments and molecular three-body distorted wave theory. Journal of Physics B: Atomic, Molecular and Optical Physics, 49(19), article no. 195203.

DOI: https://doi.org/10.1088/0953-4075/49/19/195203

Abstract

Experimental and theoretical triple differential ionisation cross-sections (TDCS’s) are presented for the highest occupied molecular orbital of sulphur hexafluoride. These measurements were performed in the low energy regime, with outgoing electron energies ranging from 5 to 40 eV in a coplanar geometry, and with energies of 10 and 20 eV in a perpendicular geometry. Complementary theoretical predictions of the TDCS were calculated using the molecular three-body distorted wave formalism. Calculations were performed using a proper average over molecular orientations as well as the orientation-averaged molecular orbital approximation. This more sophisticated model was found to be in closer agreement with the experimental data, however neither model accurately predicts the TDCS over all geometries and energies.

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