Physics of Particles and Nuclei Letters

, Volume 14, Issue 4, pp 584–590 | Cite as

Interpreting the data on helium-ion scattering in metallic films

  • A. A. Bednyakov
Physics of Elementary Particles and Atomic Nuclei. Experiment


Earlier measurements of angular distributions in the multiple scattering of a helium-ion beam with energy below 300 keV on Al yielded rather unexpected results: the ratio between the half-width of the measured angular distribution, (θ1/2)e, and that predicted with the Moliere–Bethe theory, (θ1/2)MB, proved to stay almost constant throughout the investigated energy range. At the same time, one could expect the (θ1/2)e/(θ1/2)MB value to be affected by the beam-content variation due to the charge–exchange scattering. Towards resolving this problem, we compute the interaction potentials between the Не++, Не+, and Не0 ions and the scattering atoms and reveal the electron-screening effects on the scattering process. Thereby, we explain the energy dependence of (θ1/2)e/(θ1/2)MB observed in the old and new measurements carried out at higher beam energies.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    A. A. Bednyakov, V. G. Ignatov, A. F. Tulinov, and Yu. N. Shustikov, “Multiple scattering and energy loss of helium ions in aluminum at energies below 300 keV,” Vestn. Mosk. Univ., Ser.: Fiz., Astron., No. 4, 402 (1971).Google Scholar
  2. 2.
    G. Moliere, “Teorie der streuung schneller gelander Teilihen. II,” Z. Naturforsch. 3a (2), 78 (1948).ADSGoogle Scholar
  3. 3.
    H. A. Bethe, “Moliere’s theory of multiple scattering,” Phys. Rev. 89, 1256 (1953).ADSMathSciNetCrossRefMATHGoogle Scholar
  4. 4.
    A. A. Bednyakov, Yu. V. Bulgakov, I. D. Koshevoi, V. S. Nikolaev, and V. P. Sobakin, “Angular scatterings of helium ions, scattered by thin metal films,” in Proceedings of the 8th All-Union Workshop on Physics of Interaction of Charged Particles with Single Crystals (Mosk. Gos. Univ., Moscow, 1977), p. 128.Google Scholar
  5. 5.
    L. Mayer, “Plural and multiple scattering of ions of low energy heavy particles in solids,” Phys. Status Solidi B 44, 253 (1971).ADSCrossRefGoogle Scholar
  6. 6.
    P. Sigmund and K. B. Winterbon, “Small-angle multiple scattering of ions in screened Coulomb region: I. Angular distributions,” Nucl. Instrum. Methods Phys. Res. 119, 541 (1974).ADSCrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  1. 1.Skobel’tsyn Institute of Nuclear PhysicsMoscow State UniversityMoscowRussia

Personalised recommendations