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Abstract:

In this work we introduce a distorted-wave method, based on the initial value representation approach of the quantum evolution operator, in order to improve the description of rainbow effects given by the surface eikonal (SE) model for diffraction from crystal surfaces produced by grazing scattering of fast atoms. The proposed theory, named the surface initial value representation (SIVR) approximation, is applied to He atoms colliding with a LiF(001) surface along low-indexed crystallographic channels. For this collision system the SIVR approach provides a very good representation of the quantum interference structures of experimental projectile distributions, even in the angular region around classical rainbow angles where the semiclassical SE method diverges. © 2014 American Physical Society.

Registro:

Documento: Artículo
Título:Semiquantum approach for fast atom diffraction: Solving the rainbow divergence
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:Diffraction; Collision systems; Crystal surfaces; Fast atom diffractions; Grazing scattering; Initial value representation; Projectile distributions; Quantum evolution; Quantum interference; Atoms
Año:2014
Volumen:90
Número:5
DOI: http://dx.doi.org/10.1103/PhysRevA.90.052718
Título revista:Physical Review A - Atomic, Molecular, and Optical Physics
Título revista abreviado:Phys Rev A
ISSN:10502947
CODEN:PLRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v90_n5_p_Gravielle

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Citas:

---------- APA ----------
Gravielle, M.S. & Miraglia, J.E. (2014) . Semiquantum approach for fast atom diffraction: Solving the rainbow divergence. Physical Review A - Atomic, Molecular, and Optical Physics, 90(5).
http://dx.doi.org/10.1103/PhysRevA.90.052718
---------- CHICAGO ----------
Gravielle, M.S., Miraglia, J.E. "Semiquantum approach for fast atom diffraction: Solving the rainbow divergence" . Physical Review A - Atomic, Molecular, and Optical Physics 90, no. 5 (2014).
http://dx.doi.org/10.1103/PhysRevA.90.052718
---------- MLA ----------
Gravielle, M.S., Miraglia, J.E. "Semiquantum approach for fast atom diffraction: Solving the rainbow divergence" . Physical Review A - Atomic, Molecular, and Optical Physics, vol. 90, no. 5, 2014.
http://dx.doi.org/10.1103/PhysRevA.90.052718
---------- VANCOUVER ----------
Gravielle, M.S., Miraglia, J.E. Semiquantum approach for fast atom diffraction: Solving the rainbow divergence. Phys Rev A. 2014;90(5).
http://dx.doi.org/10.1103/PhysRevA.90.052718