Kheifets, AnatoliNaja, AStaicu-Casagrande, E.M.Lahmam-Bennani, A2015-12-100953-4075http://hdl.handle.net/1885/51621We analyse the recoil-to-binary (RB) peak intensity ratio in an energetic (e, 2e) reaction performed on the valence ns sub-shell of noble gas atoms away from the Bethe ridge condition. A qualitative change in the RB ratio dependence on the ejected electron energy from He to Ar can be explained by the variation of reflectivity of the short-range Hartree-Fock potential. The reflectivity increases profoundly from lighter (He) to heavier (Ne and Ar) noble gas atoms because of modification of the scattering phases due to occupation of the target p orbitals (Levinson-Seaton theorem). This effect is further modified due to strong inter-shell correlations in Ar. These theoretical predictions are confirmed experimentally.Keywords: Ejected electrons; Hartree-Fock potential; Noble gas atoms; Orbitals; Peak intensity ratio; Qualitative changes; Ratio dependence; Theoretical prediction; Helium; Neon; Reflection; Inert gases200910.1088/0953-4075/42/16/1652042016-02-24