The well depths of XeF − and XeCl − from differential scattering measurements

Abstract

Elastic differential cross section measurements were performed for F − + Xe and Cl − + Xe in an energy range of 250–500 eV and in an angular range of 0–6 mrad. In contrast to the case of C1 − on Xe, the rainbow structure in the cross section for F − on Xe was well resolved. From the measurements the well depth of XeF − has been determined to be 0.28 ± 0.04 eV, while for XeC1 − the well depth should be less than 0.14 eV.