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Interpreting the data on helium-ion scattering in metallic films

  • Physics of Elementary Particles and Atomic Nuclei. Experiment
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Abstract

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.

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References

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Authors and Affiliations

  1. Skobel’tsyn Institute of Nuclear Physics, Moscow State University, Moscow, 123182, Russia

    A. A. Bednyakov

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  1. A. A. Bednyakov
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Correspondence to A. A. Bednyakov.

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Original Russian Text © A.A. Bednyakov, 2017, published in Pis’ma v Zhurnal Fizika Elementarnykh Chastits i Atomnogo Yadra, 2017

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Bednyakov, A.A. Interpreting the data on helium-ion scattering in metallic films. Phys. Part. Nuclei Lett. 14, 584–590 (2017). https://doi.org/10.1134/S1547477117040021

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  • DOI: https://doi.org/10.1134/S1547477117040021

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