Abstract:
The energy lost by a heavy projectile, with charge [Formula Presented] moving in a free-electron gas is studied within the framework of the dielectric formalism. In this model, the potential induced by the projectile is expanded in a perturbative series, and terms up to second order in [Formula Presented] are conserved. The obtained quadratic potential is expressed as a function of the first-order dielectric response or Lindhard dielectric function. We apply the formalism to the calculation of stopping for different fixed charges (protons, neutral hydrogen, and antiprotons) moving in aluminum. Energy-loss distributions are investigated, and in the case of antiprotons, the second-order term is modified to avoid negative probabilities. The total stopping power, calculated taking into account the inner-shell contribution and different charge states in equilibrium, is compared with experimental data. The induced electronic density is also studied, and results agree with those derived from the density-functional theory. © 2001 The American Physical Society.
Registro:
Documento: |
Artículo
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Título: | Second-order dielectric stopping of ions in a free-electron gas |
Autor: | Arbó, D.G.; Gravielle, M.S.; Miraglia, J.E. |
Filiación: | Instituto de Astronomía y Física del Espacio, Consejo Nacional de Investigaciones Científicas y Técnicas, Casilla de Correos 67 Sucursal 28, Buenos Aires, 1428, Argentina Departamento de Física, FCEyN, Universidad de Buenos Aires, Argentina
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Año: | 2001
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Volumen: | 64
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Número: | 2
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Página de inicio: | 8
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DOI: |
http://dx.doi.org/10.1103/PhysRevA.64.022902 |
Título revista: | Physical Review A - Atomic, Molecular, and Optical Physics
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Título revista abreviado: | Phys Rev A
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ISSN: | 10502947
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v64_n2_p8_Arbo |
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Citas:
---------- APA ----------
Arbó, D.G., Gravielle, M.S. & Miraglia, J.E.
(2001)
. Second-order dielectric stopping of ions in a free-electron gas. Physical Review A - Atomic, Molecular, and Optical Physics, 64(2), 8.
http://dx.doi.org/10.1103/PhysRevA.64.022902---------- CHICAGO ----------
Arbó, D.G., Gravielle, M.S., Miraglia, J.E.
"Second-order dielectric stopping of ions in a free-electron gas"
. Physical Review A - Atomic, Molecular, and Optical Physics 64, no. 2
(2001) : 8.
http://dx.doi.org/10.1103/PhysRevA.64.022902---------- MLA ----------
Arbó, D.G., Gravielle, M.S., Miraglia, J.E.
"Second-order dielectric stopping of ions in a free-electron gas"
. Physical Review A - Atomic, Molecular, and Optical Physics, vol. 64, no. 2, 2001, pp. 8.
http://dx.doi.org/10.1103/PhysRevA.64.022902---------- VANCOUVER ----------
Arbó, D.G., Gravielle, M.S., Miraglia, J.E. Second-order dielectric stopping of ions in a free-electron gas. Phys Rev A. 2001;64(2):8.
http://dx.doi.org/10.1103/PhysRevA.64.022902