Artículo
Ambrosio, M.J.; Colavecchia, F.D.; Gasaneo, G.; Mitnik, D.M.; Ancarani, L.U. "Double ionization of helium by fast electrons with the Generalized Sturmian Functions method" (2015) Journal of Physics B: Atomic, Molecular and Optical Physics. 48(5)
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Abstract:
The double ionization of helium by high energy electron impact is studied. The corresponding four-body Schrödinger equation is transformed into a set of driven equations containing successive orders in the projectile-target interaction. The first order driven equation is solved with a generalized Sturmian functions approach. The transition amplitude, extracted from the asymptotic limit of the first order solution, is equivalent to the familiar first Born approximation. Fivefold differential cross sections are calculated for (e, 3e) processes within the high incident energy and small momentum transfer regimes. The results are compared with other numerical methods, and with the only absolute experimental data available. Our cross sections agree in shape and magnitude with those of the convergent close coupling method for the (10+10) eV and (4+4) eV emission energies. To date this had not been achieved by any two different numerical schemes when solving the three-body continuum problem for the fast projectile (e, 3e) process. Though agreement with the experimental data, in particular with respect to the magnitude, is not achieved, our findings partly clarify a long standing puzzle. © 2015 IOP Publishing Ltd.
Registro:
| Documento: | Artículo |
| Título: | Double ionization of helium by fast electrons with the Generalized Sturmian Functions method |
| Autor: | Ambrosio, M.J.; Colavecchia, F.D.; Gasaneo, G.; Mitnik, D.M.; Ancarani, L.U. |
| Filiación: | Instituto de Astronomía y Física Del Espacio (IAFE, CONICET-UBA), Buenos Aires, Argentina División Física Atómica, Molecular y Óptica, Centro Atómico Bariloche, S. C. de Bariloche, Río Negro, 8400, Argentina Departamento de Física, Universidad Nacional Del sur, Bahía Blanca, Buenos Aires, 8000, Argentina FCEyN Universidad de Buenos Aires, Argentina Modélisation, Université de Lorraine, Metz, 57078, France Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Argentina |
| Palabras clave: | double ionization; first born; fully differential cross section; helium; Helium; Impact ionization; Projectiles; Convergent close coupling methods; Differential cross section; Double ionization; first born; First Born approximation; Fully differential cross sections; Projectile target interaction; Transition amplitudes; Numerical methods |
| Año: | 2015 |
| Volumen: | 48 |
| Número: | 5 |
| DOI: | http://dx.doi.org/10.1088/0953-4075/48/5/055204 |
| 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_v48_n5_p_Ambrosio |
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Citas:
---------- APA ----------
Ambrosio, M.J., Colavecchia, F.D., Gasaneo, G., Mitnik, D.M. & Ancarani, L.U. (2015) . Double ionization of helium by fast electrons with the Generalized Sturmian Functions method. Journal of Physics B: Atomic, Molecular and Optical Physics, 48(5).http://dx.doi.org/10.1088/0953-4075/48/5/055204
---------- CHICAGO ----------
Ambrosio, M.J., Colavecchia, F.D., Gasaneo, G., Mitnik, D.M., Ancarani, L.U. "Double ionization of helium by fast electrons with the Generalized Sturmian Functions method" . Journal of Physics B: Atomic, Molecular and Optical Physics 48, no. 5 (2015).http://dx.doi.org/10.1088/0953-4075/48/5/055204
---------- MLA ----------
Ambrosio, M.J., Colavecchia, F.D., Gasaneo, G., Mitnik, D.M., Ancarani, L.U. "Double ionization of helium by fast electrons with the Generalized Sturmian Functions method" . Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 48, no. 5, 2015.http://dx.doi.org/10.1088/0953-4075/48/5/055204
---------- VANCOUVER ----------
Ambrosio, M.J., Colavecchia, F.D., Gasaneo, G., Mitnik, D.M., Ancarani, L.U. Double ionization of helium by fast electrons with the Generalized Sturmian Functions method. J Phys B At Mol Opt Phys. 2015;48(5).http://dx.doi.org/10.1088/0953-4075/48/5/055204
