The observation of rotational and vibrational excitation of SF 6 in the scattering from Ar at center-of-mass energies around 1 eV

Abstract

Time-of-flight spectra of SF 6 molecules scattered from a crossed beam of Ar atoms were measured at center-of-mass energies of 0.73 and 1.05 eV over a wide range of laboratory angles corresponding to center-of-mass angles ▪. The data were transformed to the center-of-mass system to calculate the average energy transfers and energy-loss angle contour diagrams. The energy loss rises linearly with center-of-mass scattering angles and reaches a maximum for both incident energies corresponding to ≈ 40% of E c.m. at 140°. The relative contributions of rotational and vibrational excitation have been estimated.