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Abstract:

The sudden Coulomb-Volkov theoretical approximation has been shown to well describe atomic ionization by intense and ultra-short electromagnetic pulses, such as pulses generated by very fast highly-charged ions. This approach is extended here to investigate single ionization of homonuclear diatomic molecules by such pulses in the framework of one-active electron. Under particular conditions, a Young-like interference formula can approximately be factored out. Present calculations show interference effects originating from the molecular two-centre structure. Fivefold differential angular distributions of the ejected electron are studied as a function of the molecular orientation and internuclear distance. Both non-perturbative and perturbative regimes are examined. In the non-perturbative case, an interference pattern is visible but a main lobe, opposite to the electric field polarization direction, dominates the angular distribution. In contrast, in perturbation conditions the structure of interferences shows analogies to the Young-like interference pattern obtained in ionization of molecules by fast electron impacts. Finally, the strong dependence of these Young-like angular distributions on the internuclear distance is addressed. © 2005 IOP Publishing Ltd.

Registro:

Documento: Artículo
Título:H2+ ionization by ultra-short electromagnetic pulses investigated through a non-perturbative Coulomb-Volkov approach
Autor:Rodríguez, V.D.; Macri, P.; Gayet, R.
Filiación:Departamento de Física, FCEyN, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Instituto de Astronomía y Física del Espacio, Consejo Nacional de Investigaciones Científicas y Técnicas, 1428 Buenos Aires, Argentina
CELIA (Centre Lasers Intenses et Applications), UMR 5107, Unité Mixte de Recherche, Université Bordeaux 1, 351 Cours de la Libération, 33405 Talence Cedex, France
Palabras clave:Approximation theory; Charged particles; Electromagnetic pulse; Electromagnetic wave polarization; Heavy ions; Hydrogen; Perturbation techniques; Angular distributions; Atomic ionization; Non-perturbative Coulomb-Volkov approach; Ultra-short electromagnetic pulses; Ionization
Año:2005
Volumen:38
Número:15
Página de inicio:2775
Página de fin:2791
DOI: http://dx.doi.org/10.1088/0953-4075/38/15/015
Título revista:Journal of Physics B: Atomic, Molecular and Optical Physics
Título revista abreviado:J Phys B At Mol Opt Phys
ISSN:09534075
CODEN:JPAPE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09534075_v38_n15_p2775_Rodriguez

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Citas:

---------- APA ----------
Rodríguez, V.D., Macri, P. & Gayet, R. (2005) . H2+ ionization by ultra-short electromagnetic pulses investigated through a non-perturbative Coulomb-Volkov approach. Journal of Physics B: Atomic, Molecular and Optical Physics, 38(15), 2775-2791.
http://dx.doi.org/10.1088/0953-4075/38/15/015
---------- CHICAGO ----------
Rodríguez, V.D., Macri, P., Gayet, R. "H2+ ionization by ultra-short electromagnetic pulses investigated through a non-perturbative Coulomb-Volkov approach" . Journal of Physics B: Atomic, Molecular and Optical Physics 38, no. 15 (2005) : 2775-2791.
http://dx.doi.org/10.1088/0953-4075/38/15/015
---------- MLA ----------
Rodríguez, V.D., Macri, P., Gayet, R. "H2+ ionization by ultra-short electromagnetic pulses investigated through a non-perturbative Coulomb-Volkov approach" . Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 38, no. 15, 2005, pp. 2775-2791.
http://dx.doi.org/10.1088/0953-4075/38/15/015
---------- VANCOUVER ----------
Rodríguez, V.D., Macri, P., Gayet, R. H2+ ionization by ultra-short electromagnetic pulses investigated through a non-perturbative Coulomb-Volkov approach. J Phys B At Mol Opt Phys. 2005;38(15):2775-2791.
http://dx.doi.org/10.1088/0953-4075/38/15/015