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Ambrosio, M.J.; Colavecchia, F.D.; Mitnik, D.M.; Gasaneo, G. "Discrepancy between theory and experiment in double ionization of helium by fast electrons" (2015) Physical Review A - Atomic, Molecular, and Optical Physics. 91(1)
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Abstract:

We compute fully differential cross sections for double ionization of helium by electrons, within the high-impact-energy and low-momentum transfer regimes, using the generalized Sturmian functions approach. Our results are converged relative to the total angular momentum and variable domain size. The method shows very good agreement with convergent close coupling calculations performed by Kheifets et al. [J. Phys. B 32, 5047 (1999)JPAPEH0953-407510.1088/0953-4075/32/21/301] for all ejection angles for the two electron emission energies considered in the experiments reported in that contribution. Both theoretical methods provide fully differential cross sections that require the same upscaling factors to compare with experimental data and are based on a first-order Born model for the projectile-target interaction. Since that reference was published, there were several theoretical efforts to account for the absolute scale of the experimental results, but agreement in the cross-section magnitude was not achieved even between theories. With the present contribution we conclude that the first-order Born model is now adequately solved, shifting the magnitude controversy towards either the experimental data and/or the addition of higher degrees of projectile-target interaction to the calculation. © 2015 American Physical Society.

Registro:

Documento: Artículo
Título:Discrepancy between theory and experiment in double ionization of helium by fast electrons
Autor:Ambrosio, M.J.; Colavecchia, F.D.; Mitnik, D.M.; Gasaneo, G.
Filiación:Instituto de Astronomía y Física Del Espacio (IAFE, CONICET-UBA), Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Argentina
División Física Atómica, Molecular y Óptica, Centro Atómico Bariloche, CONICET, San Carlos de Bariloche, Río Negro, 8400, Argentina
Departamento de Física, Universidad Nacional Del sur, Bahía Blanca, Buenos Aires, 8000, Argentina
Palabras clave:Electron emission; Helium; Projectiles; Convergent close-coupling calculations; Electron emission energy; Fully differential cross sections; High impact energy; Low momentum transfers; Projectile target interaction; Sturmian functions; Theoretical methods; Ionization
Año:2015
Volumen:91
Número:1
DOI: http://dx.doi.org/10.1103/PhysRevA.91.012704
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_v91_n1_p_Ambrosio

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Citas:

---------- APA ----------
Ambrosio, M.J., Colavecchia, F.D., Mitnik, D.M. & Gasaneo, G. (2015) . Discrepancy between theory and experiment in double ionization of helium by fast electrons. Physical Review A - Atomic, Molecular, and Optical Physics, 91(1).
http://dx.doi.org/10.1103/PhysRevA.91.012704
---------- CHICAGO ----------
Ambrosio, M.J., Colavecchia, F.D., Mitnik, D.M., Gasaneo, G. "Discrepancy between theory and experiment in double ionization of helium by fast electrons" . Physical Review A - Atomic, Molecular, and Optical Physics 91, no. 1 (2015).
http://dx.doi.org/10.1103/PhysRevA.91.012704
---------- MLA ----------
Ambrosio, M.J., Colavecchia, F.D., Mitnik, D.M., Gasaneo, G. "Discrepancy between theory and experiment in double ionization of helium by fast electrons" . Physical Review A - Atomic, Molecular, and Optical Physics, vol. 91, no. 1, 2015.
http://dx.doi.org/10.1103/PhysRevA.91.012704
---------- VANCOUVER ----------
Ambrosio, M.J., Colavecchia, F.D., Mitnik, D.M., Gasaneo, G. Discrepancy between theory and experiment in double ionization of helium by fast electrons. Phys Rev A. 2015;91(1).
http://dx.doi.org/10.1103/PhysRevA.91.012704