Differential cross sections for single ionization of Li in collisions with fast protons and O8+ ions

L. Gulyás, S. Egri, and T. Kirchner
Phys. Rev. A 90, 062710 – Published 15 December 2014

Abstract

We study the process of single ionization of Li in collisions with H+ and O8+ projectile ions at 6-MeV and 1.5-MeV/amu impact energies, respectively. Using the frameworks of the independent-electron model and the impact parameter picture, fully (FDCS) and doubly (DDCS) differential cross sections are evaluated in the continuum distorted wave with eikonal initial-state approximation. Comparisons are made with the recent measurements of LaForge et al. [J. Phys. B 46, 031001 (2013)] for the DDCS and Hubele et al. [Phys. Rev. Lett. 110, 133201 (2013)] for the FDCS, respectively. For O8+ impact inclusion of the heavy particle [nucleus-nucleus (NN)] interaction in the calculations is crucial and effects of polarization due to the presence of the projectile ion have also to be taken into account for getting very good agreement with the measured data. Our calculation reproduces the satellite peak structure seen in the FDCS for the Li(2s) measurement, which we explain as being formed by a combination of the binary and NN interactions.

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  • Received 16 September 2014

DOI:https://doi.org/10.1103/PhysRevA.90.062710

©2014 American Physical Society

Authors & Affiliations

L. Gulyás

  • Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), H-4001 Debrecen, PO Box 51, Hungary

S. Egri

  • Department of Experimental Physics, University of Debrecen, 18/a Bem tér, H-4026 Debrecen, Hungary

T. Kirchner

  • Department of Physics and Astronomy, York University, 4700 Keele Street, Toronto, Ontario, Canada M3J 1P3

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Vol. 90, Iss. 6 — December 2014

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