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Gravielle, M.S.; Miraglia, J.E. "Single- and double-slit collimating effects on fast-atom diffraction spectra" (2016) Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 382:42-48
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Abstract:

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.

Registro:

Documento: Artículo
Título:Single- and double-slit collimating effects on fast-atom diffraction spectra
Autor:Gravielle, M.S.; Miraglia, J.E.
Filiación:Instituto de Astronomía y Física del Espacio, IAFE, CONICET-UBA, casilla de correo 67, sucursal 28, Buenos Aires, C1428EGA, Argentina
Palabras clave: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
Año:2016
Volumen:382
Página de inicio:42
Página de fin:48
DOI: http://dx.doi.org/10.1016/j.nimb.2016.03.042
Título revista:Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Título revista abreviado:Nucl Instrum Methods Phys Res Sect B
ISSN:0168583X
CODEN:NIMBE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0168583X_v382_n_p42_Gravielle

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Citas:

---------- APA ----------
Gravielle, M.S. & Miraglia, J.E. (2016) . Single- and double-slit collimating effects on fast-atom diffraction spectra. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 382, 42-48.
http://dx.doi.org/10.1016/j.nimb.2016.03.042
---------- CHICAGO ----------
Gravielle, M.S., Miraglia, J.E. "Single- and double-slit collimating effects on fast-atom diffraction spectra" . Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 382 (2016) : 42-48.
http://dx.doi.org/10.1016/j.nimb.2016.03.042
---------- MLA ----------
Gravielle, M.S., Miraglia, J.E. "Single- and double-slit collimating effects on fast-atom diffraction spectra" . Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 382, 2016, pp. 42-48.
http://dx.doi.org/10.1016/j.nimb.2016.03.042
---------- VANCOUVER ----------
Gravielle, M.S., Miraglia, J.E. Single- and double-slit collimating effects on fast-atom diffraction spectra. Nucl Instrum Methods Phys Res Sect B. 2016;382:42-48.
http://dx.doi.org/10.1016/j.nimb.2016.03.042