dc.creator | Arbo, Diego | |
dc.creator | Gravielle, Maria Silvia | |
dc.creator | Miraglia, Jorge Esteban | |
dc.date.accessioned | 2017-08-14T20:40:17Z | |
dc.date.available | 2017-08-14T20:40:17Z | |
dc.date.created | 2017-08-14T20:40:17Z | |
dc.date.issued | 2001-12 | |
dc.identifier | Arbo, Diego; Gravielle, Maria Silvia; Miraglia, Jorge Esteban; Second-order dielectric stopping of ions in a free-electron gas; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 64; 2; 12-2001; 1-8; 022902 | |
dc.identifier | 1050-2947 | |
dc.identifier | http://hdl.handle.net/11336/22381 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.description.abstract | The energy lost by a heavy projectile, with charge ZP, 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 ZP 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. | |
dc.language | eng | |
dc.publisher | American Physical Society | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevA.64.022902 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pra/abstract/10.1103/PhysRevA.64.022902 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.subject | Dielectric Formalism | |
dc.subject | Stopping | |
dc.subject | Free Electron Gas | |
dc.subject | Barkas | |
dc.title | Second-order dielectric stopping of ions in a free-electron gas | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |