Relativistic calculations of the K-K charge transfer and K-vacancy production probabilities in low-energy ion-atom collisions
The previously developed technique for evaluation of charge transfer and electron-excitation processes in low-energy heavy-ion collisions [Tupitsyn et al., Phys. Rev. A 82, 042701 (2010)] is extended to collisions of ions with neutral atoms. The method employs the active-electron approximation, in w...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
28 March 2012
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| In: |
Physical review. A, Atomic, molecular, and optical physics
Year: 2012, Jahrgang: 85, Heft: 3 |
| ISSN: | 1094-1622 |
| DOI: | 10.1103/PhysRevA.85.032712 |
| Online-Zugang: | Verlag, Pay-per-use, Volltext: http://dx.doi.org/10.1103/PhysRevA.85.032712 Verlag, Pay-per-use, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.85.032712 
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| Verfasserangaben: | I.I. Tupitsyn, Y.S. Kozhedub, V.M. Shabaev, A.I. Bondarev, G.B. Deyneka, I.A. Maltsev, S. Hagmann, G. Plunien, and Th. Stöhlker |
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| 245 | 1 | 0 | |a Relativistic calculations of the K-K charge transfer and K-vacancy production probabilities in low-energy ion-atom collisions |c I.I. Tupitsyn, Y.S. Kozhedub, V.M. Shabaev, A.I. Bondarev, G.B. Deyneka, I.A. Maltsev, S. Hagmann, G. Plunien, and Th. Stöhlker |
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| 520 | |a The previously developed technique for evaluation of charge transfer and electron-excitation processes in low-energy heavy-ion collisions [Tupitsyn et al., Phys. Rev. A 82, 042701 (2010)] is extended to collisions of ions with neutral atoms. The method employs the active-electron approximation, in which only the active-electron participates in the charge transfer and excitation processes while the passive electrons provide the screening density-functional theory (DFT) potential. The time-dependent Dirac wave function of the active electron is represented as a linear combination of atomic-like Dirac-Fock-Sturm orbitals, localized at the ions (atoms). The screening DFT potential is calculated using the overlapping densities of each ion (atom), derived from the atomic orbitals of the passive electrons. The atomic orbitals are generated by solving numerically the one-center Dirac-Fock and Dirac-Fock-Sturm equations by means of a finite-difference approach with the potential taken as the sum of the exact reference ion (atom) Dirac-Fock potential and of the Coulomb potential from the other ion within the monopole approximation. The method developed is used to calculate the K-K charge transfer and K-vacancy production probabilties for the Ne(1s22s22p6)-F8+(1s) collisions at the F8+(1s) projectile energies 130 and 230 keV/u. The obtained results are compared with experimental data and other theoretical calculations. The K-K charge transfer and K-vacancy production probabilities are also calculated for the Xe-Xe53+(1s) collision. | ||
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