Energy-loss contribution for fast He atoms axially scattered off a silver surface

29th International Conference on Photonic, Electronic, and Atomic Collisions

Rubiano, C.A. Ríos^1 ; Bocan, G.A.^2 ; Juaristi, J.I.^3,4 ; Gravielle, M.S.^1

Instituto de Astronomía y Física Del Espacio (IAFE, CONICET-UBA), Buenos Aires, Argentina^1

Centro Atómico Bariloche, CONICET, S.C. de Bariloche, Río Negro, Argentina^2

Depto. de Física de Materiales, Facultad de Químicas, UPV/EHU, San Sebastian

20018, Spain^3

Donostia International Physics Center (DIPC), Centro de Física de Materiales CFM/MPC (CSIC-UPV/EHU), San Sebastian

20018, Spain^4

关键词: Dissipative effects;    Electronic excitation;    Energy loss distributions;    Energy-loss spectrum;    Experimental conditions;    Fast atom diffractions;    Inelastic contributions;    Projectile distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/3/032013/pdf
DOI  :  10.1088/1742-6596/635/3/032013

来源: IOP

【 摘 要 】

Angle- and energy-loss- resolved distributions for He atoms axially scattered off a Ag(110) surface are calculated in order to study the influence of inelastic processes on fast atom diffraction (FAD) spectra. Final projectile distributions are evaluated within a semi-classical formalism that includes dissipative effects due to electronic excitations. For monoenergetic beams the model predicts the presence of multiple peaks in energy-loss spectra. But these structures disappear when the experimental conditions are included, giving rise to an energy-loss distribution in good agreement with available experimental data. The inelastic contribution to FAD patterns is estimated.