Single- and double-slit collimating effects on fast-atom diffraction spectra
Diffraction patterns produced by fast He atoms grazingly impinging on a LiF(0 0 1) surface are investigated focusing on the influence of the beam collimation. Single- and double-slit collimating devices situated in front of the beam source are considered. To describe the scattering process we use th...
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2016
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0168583X_v382_n_p42_Gravielle http://hdl.handle.net/20.500.12110/paper_0168583X_v382_n_p42_Gravielle |
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paper:paper_0168583X_v382_n_p42_Gravielle2023-06-08T15:17:52Z Single- and double-slit collimating effects on fast-atom diffraction spectra Beam collimation Coherence Fast atom diffraction Surface Coherent light Diffraction Surfaces Wave packets Beam collimation Fast atom diffractions Initial value representation Initial wave packet Interference mechanisms Quantum approach Scattering process Uncertainty principles Atoms Diffraction patterns produced by fast He atoms grazingly impinging on a LiF(0 0 1) surface are investigated focusing on the influence of the beam collimation. Single- and double-slit collimating devices situated in front of the beam source are considered. To describe the scattering process we use the Surface Initial Value Representation (SIVR) approximation, which is a semi-quantum approach that incorporates a realistic description of the initial wave packet in terms of the collimating parameters. Our initial wave-packet model is based on the Van Cittert–Zernike theorem. For a single-slit collimation the width of the collimating aperture controls the shape of the azimuthal angle distribution, making different interference mechanisms visible, while the length of the slit affects the polar angle distribution. Additionally, we found that by means of a double-slit collimation it might be possible to obtain a wide polar angle distribution, which is associated with a large spread of the initial momentum perpendicular to the surface, derived from the uncertainty principle. It might be used as a simple way to probe the surface potential for different normal energies. © 2016 Elsevier B.V. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0168583X_v382_n_p42_Gravielle http://hdl.handle.net/20.500.12110/paper_0168583X_v382_n_p42_Gravielle |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Beam collimation Coherence Fast atom diffraction Surface Coherent light Diffraction Surfaces Wave packets Beam collimation Fast atom diffractions Initial value representation Initial wave packet Interference mechanisms Quantum approach Scattering process Uncertainty principles Atoms |
| spellingShingle |
Beam collimation Coherence Fast atom diffraction Surface Coherent light Diffraction Surfaces Wave packets Beam collimation Fast atom diffractions Initial value representation Initial wave packet Interference mechanisms Quantum approach Scattering process Uncertainty principles Atoms Single- and double-slit collimating effects on fast-atom diffraction spectra |
| topic_facet |
Beam collimation Coherence Fast atom diffraction Surface Coherent light Diffraction Surfaces Wave packets Beam collimation Fast atom diffractions Initial value representation Initial wave packet Interference mechanisms Quantum approach Scattering process Uncertainty principles Atoms |
| description |
Diffraction patterns produced by fast He atoms grazingly impinging on a LiF(0 0 1) surface are investigated focusing on the influence of the beam collimation. Single- and double-slit collimating devices situated in front of the beam source are considered. To describe the scattering process we use the Surface Initial Value Representation (SIVR) approximation, which is a semi-quantum approach that incorporates a realistic description of the initial wave packet in terms of the collimating parameters. Our initial wave-packet model is based on the Van Cittert–Zernike theorem. For a single-slit collimation the width of the collimating aperture controls the shape of the azimuthal angle distribution, making different interference mechanisms visible, while the length of the slit affects the polar angle distribution. Additionally, we found that by means of a double-slit collimation it might be possible to obtain a wide polar angle distribution, which is associated with a large spread of the initial momentum perpendicular to the surface, derived from the uncertainty principle. It might be used as a simple way to probe the surface potential for different normal energies. © 2016 Elsevier B.V. |
| title |
Single- and double-slit collimating effects on fast-atom diffraction spectra |
| title_short |
Single- and double-slit collimating effects on fast-atom diffraction spectra |
| title_full |
Single- and double-slit collimating effects on fast-atom diffraction spectra |
| title_fullStr |
Single- and double-slit collimating effects on fast-atom diffraction spectra |
| title_full_unstemmed |
Single- and double-slit collimating effects on fast-atom diffraction spectra |
| title_sort |
single- and double-slit collimating effects on fast-atom diffraction spectra |
| publishDate |
2016 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0168583X_v382_n_p42_Gravielle http://hdl.handle.net/20.500.12110/paper_0168583X_v382_n_p42_Gravielle |
| _version_ |
1768545550945222656 |