Influence of the dynamical image potential on the rainbows in ion channeling through short carbon nanotubes

D. Borka, S. Petrović, N. Nešković, D. J. Mowbray, and Z. L. Mišković
Phys. Rev. A 73, 062902 – Published 29 June 2006

Abstract

We investigate the influence of the dynamic polarization of the carbon valence electrons on the angular distributions of protons channeled through short (11,9) single-wall carbon nanotubes at speeds of 3 and 5a.u. (corresponding to the proton energies of 0.223 and 0.621MeV), with the nanotube length varied from 0.1 to 0.3μm. The dynamic image force on protons is calculated by means of a two-dimensional hydrodynamic model for the nanotube’s dielectric response, whereas the repulsive interaction with the nanotube’s cylindrical wall is modeled by a continuum potential based on the Doyle-Turner interatomic potential. The angular distributions of channeled protons are generated by a computer simulation method using the numerical solution of the proton equations of motion in the transverse plane. Our analysis shows that the inclusion of the image interaction causes qualitative changes in the proton deflection function, giving rise to a number of rainbow maxima in the corresponding angular distribution. We propose that observations of those rainbow maxima could be used to deduce detailed information on the relevant interaction potentials, and consequently to probe the electron distribution inside carbon nanotubes.

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  • Received 11 April 2006

DOI:https://doi.org/10.1103/PhysRevA.73.062902

©2006 American Physical Society

Authors & Affiliations

D. Borka1, S. Petrović1, N. Nešković1, D. J. Mowbray2, and Z. L. Mišković2

  • 1Laboratory of Physics (010), Vinča Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia and Montenegro
  • 2Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1

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Vol. 73, Iss. 6 — June 2006

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