Influence of beam collimation on fast-atom diffraction studied via a semiquantum approach

The influence of the collimating conditions of the incident beam on diffraction patterns produced by grazing scattering of fast atoms off crystal surfaces is studied within a semiquantum approach, called the surface initial value representation (SIVR) approximation. In this approach we incorporate a...

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Detalles Bibliográficos
Publicado:	2015
Materias:	Diffraction Beam collimation Crystal surfaces Fast atom diffractions Grazing scattering Incident particles Initial value representation Interference structures Rectangular aperture Atoms
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v92_n6_p_Gravielle http://hdl.handle.net/20.500.12110/paper_10502947_v92_n6_p_Gravielle
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10502947_v92_n6_p_Gravielle
record_format	dspace
spelling	paper:paper_10502947_v92_n6_p_Gravielle2023-06-08T16:02:52Z Influence of beam collimation on fast-atom diffraction studied via a semiquantum approach Diffraction Beam collimation Crystal surfaces Fast atom diffractions Grazing scattering Incident particles Initial value representation Interference structures Rectangular aperture Atoms The influence of the collimating conditions of the incident beam on diffraction patterns produced by grazing scattering of fast atoms off crystal surfaces is studied within a semiquantum approach, called the surface initial value representation (SIVR) approximation. In this approach we incorporate a realistic description of the incident particle in terms of the collimating parameters, which determine the surface area that is coherently illuminated. The model is applied to He atoms colliding with a LiF(001) surface after passing through a rectangular aperture. As was experimentally observed [Nucl. Instrum. Methods Phys. Res., Sect. B 350, 99 (2015)NIMBEU0168-583X10.1016/j.nimb.2015.01.016], SIVR spectra as a function of the azimuthal angle are very sensitive to the width of the collimating slit. We also found that the length of the collimating aperture affects polar angle distributions, introducing additional interference structures for the longer collimating slits. © 2015 American Physical Society. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v92_n6_p_Gravielle http://hdl.handle.net/20.500.12110/paper_10502947_v92_n6_p_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	Diffraction Beam collimation Crystal surfaces Fast atom diffractions Grazing scattering Incident particles Initial value representation Interference structures Rectangular aperture Atoms
spellingShingle	Diffraction Beam collimation Crystal surfaces Fast atom diffractions Grazing scattering Incident particles Initial value representation Interference structures Rectangular aperture Atoms Influence of beam collimation on fast-atom diffraction studied via a semiquantum approach
topic_facet	Diffraction Beam collimation Crystal surfaces Fast atom diffractions Grazing scattering Incident particles Initial value representation Interference structures Rectangular aperture Atoms
description	The influence of the collimating conditions of the incident beam on diffraction patterns produced by grazing scattering of fast atoms off crystal surfaces is studied within a semiquantum approach, called the surface initial value representation (SIVR) approximation. In this approach we incorporate a realistic description of the incident particle in terms of the collimating parameters, which determine the surface area that is coherently illuminated. The model is applied to He atoms colliding with a LiF(001) surface after passing through a rectangular aperture. As was experimentally observed [Nucl. Instrum. Methods Phys. Res., Sect. B 350, 99 (2015)NIMBEU0168-583X10.1016/j.nimb.2015.01.016], SIVR spectra as a function of the azimuthal angle are very sensitive to the width of the collimating slit. We also found that the length of the collimating aperture affects polar angle distributions, introducing additional interference structures for the longer collimating slits. © 2015 American Physical Society.
title	Influence of beam collimation on fast-atom diffraction studied via a semiquantum approach
title_short	Influence of beam collimation on fast-atom diffraction studied via a semiquantum approach
title_full	Influence of beam collimation on fast-atom diffraction studied via a semiquantum approach
title_fullStr	Influence of beam collimation on fast-atom diffraction studied via a semiquantum approach
title_full_unstemmed	Influence of beam collimation on fast-atom diffraction studied via a semiquantum approach
title_sort	influence of beam collimation on fast-atom diffraction studied via a semiquantum approach
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v92_n6_p_Gravielle http://hdl.handle.net/20.500.12110/paper_10502947_v92_n6_p_Gravielle
_version_	1768543336515239936

Influence of beam collimation on fast-atom diffraction studied via a semiquantum approach

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