Energy-loss contribution to grazing scattering of fast He atoms from a silver surface
The energy lost by helium atoms axially scattered from a Ag(110) surface is studied in order to investigate the influence of dissipative processes on fast atom diffraction spectra. In this work inelastic projectile distributions are evaluated within a semiclassical formalism that includes dissipativ...
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2014
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v89_n3_p_RiosRubiano http://hdl.handle.net/20.500.12110/paper_10502947_v89_n3_p_RiosRubiano |
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paper:paper_10502947_v89_n3_p_RiosRubiano |
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paper:paper_10502947_v89_n3_p_RiosRubiano2023-06-08T16:02:47Z Energy-loss contribution to grazing scattering of fast He atoms from a silver surface Dissipative effects Dissipative process Energy-loss spectrum Fast atom diffractions Grazing scattering Inelastic contributions Projectile distributions Transverse momenta Diffraction Friction Silver Surface scattering The energy lost by helium atoms axially scattered from a Ag(110) surface is studied in order to investigate the influence of dissipative processes on fast atom diffraction spectra. In this work inelastic projectile distributions are evaluated within a semiclassical formalism that includes dissipative effects due to electron-hole excitations through a friction force. For incidence along the [11̄2] and [11̄0] directions the model predicts the presence of multiple peaks in the energy-loss spectrum for a given impact energy. But these structures are completely washed out when the experimental dispersion of the incident beam is taken into account, giving rise to a smooth energy-loss distribution. Simulations including the experimental energy spread are in fairly good agreement with available experimental data for the [11̄2] channel. In addition, our results suggest that inelastic processes produce an almost constant background in the transverse momentum distribution, except in the extremes of the momentum range where classical rainbow maxima appear. By adding elastic and inelastic contributions, experimental diffraction patterns are well reproduced. © 2014 American Physical Society. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v89_n3_p_RiosRubiano http://hdl.handle.net/20.500.12110/paper_10502947_v89_n3_p_RiosRubiano |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Dissipative effects Dissipative process Energy-loss spectrum Fast atom diffractions Grazing scattering Inelastic contributions Projectile distributions Transverse momenta Diffraction Friction Silver Surface scattering |
| spellingShingle |
Dissipative effects Dissipative process Energy-loss spectrum Fast atom diffractions Grazing scattering Inelastic contributions Projectile distributions Transverse momenta Diffraction Friction Silver Surface scattering Energy-loss contribution to grazing scattering of fast He atoms from a silver surface |
| topic_facet |
Dissipative effects Dissipative process Energy-loss spectrum Fast atom diffractions Grazing scattering Inelastic contributions Projectile distributions Transverse momenta Diffraction Friction Silver Surface scattering |
| description |
The energy lost by helium atoms axially scattered from a Ag(110) surface is studied in order to investigate the influence of dissipative processes on fast atom diffraction spectra. In this work inelastic projectile distributions are evaluated within a semiclassical formalism that includes dissipative effects due to electron-hole excitations through a friction force. For incidence along the [11̄2] and [11̄0] directions the model predicts the presence of multiple peaks in the energy-loss spectrum for a given impact energy. But these structures are completely washed out when the experimental dispersion of the incident beam is taken into account, giving rise to a smooth energy-loss distribution. Simulations including the experimental energy spread are in fairly good agreement with available experimental data for the [11̄2] channel. In addition, our results suggest that inelastic processes produce an almost constant background in the transverse momentum distribution, except in the extremes of the momentum range where classical rainbow maxima appear. By adding elastic and inelastic contributions, experimental diffraction patterns are well reproduced. © 2014 American Physical Society. |
| title |
Energy-loss contribution to grazing scattering of fast He atoms from a silver surface |
| title_short |
Energy-loss contribution to grazing scattering of fast He atoms from a silver surface |
| title_full |
Energy-loss contribution to grazing scattering of fast He atoms from a silver surface |
| title_fullStr |
Energy-loss contribution to grazing scattering of fast He atoms from a silver surface |
| title_full_unstemmed |
Energy-loss contribution to grazing scattering of fast He atoms from a silver surface |
| title_sort |
energy-loss contribution to grazing scattering of fast he atoms from a silver surface |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v89_n3_p_RiosRubiano http://hdl.handle.net/20.500.12110/paper_10502947_v89_n3_p_RiosRubiano |
| _version_ |
1768544788678705152 |