Relativistic calculations of the KK charge transfer and Kvacancy production probabilities in lowenergy ionatom collisions
Abstract
The previously developed technique for evaluation of charge transfer and electronexcitation processes in lowenergy heavyion collisions [Tupitsyn , Phys. Rev. APLRAAN1050294710.1103/PhysRevA.82.042701 82, 042701 (2010)] is extended to collisions of ions with neutral atoms. The method employs the activeelectron approximation, in which only the activeelectron participates in the charge transfer and excitation processes while the passive electrons provide the screening densityfunctional theory (DFT) potential. The timedependent Dirac wave function of the active electron is represented as a linear combination of atomiclike DiracFockSturm 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 onecenter DiracFock and DiracFockSturm equations by means of a finitedifference approach with the potential taken as the sum of the exact reference ion (atom) DiracFock potential and of the Coulomb potential from the other ion within the monopole approximation. The method developed is used to calculate the KK charge transfer and Kvacancy production probabilties for the Ne(1s^{2}2s^{2}2p^{6})F^{8+}(1s) collisions at the F^{8+}(1s) projectile energies 130 and 230 keV/u. The obtained results are compared with experimental data and other theoretical calculations. The KK charge transfer and Kvacancy production probabilities are also calculated for the XeXe^{53+}(1s) collision.
 Publication:

Physical Review A
 Pub Date:
 March 2012
 DOI:
 10.1103/PhysRevA.85.032712
 arXiv:
 arXiv:1112.3223
 Bibcode:
 2012PhRvA..85c2712T
 Keywords:

 34.10.+x;
 34.50.s;
 34.70.+e;
 General theories and models of atomic and molecular collisions and interactions;
 Scattering of atoms and molecules;
 Charge transfer;
 Physics  Atomic Physics
 EPrint:
 16 pages, 4 figures