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DTSTART:20180325T010000
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DTSTART;TZID=Europe/Rome:20180516T160000
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DTSTAMP:20260508T130052
CREATED:20180523T184714Z
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UID:11641-1526486400-1526490000@w3.lnf.infn.it
SUMMARY:The rainbow ion-solid interaction potential
DESCRIPTION:This talk will be devoted to the rainbow proton-silicon interaction potential. We show that it can be obtained as a modification of the corresponding Molière proton-silicon interaction potential by applying the theory of crystal rainbows [1] and the experimental high-resolution angular pattern of 2 MeV protons transmitted through a 55 nm thick  Si crystal [2]. The fitting procedure has been performed so that the peripheral rainbow line\, generated by the corresponding ZBL interaction potential [3]\, and the central rainbow line\, generated by the Molière interaction potential used by Krause et al. [4]\, were at the same time well approximated by the rainbow lines generated by the rainbow interaction potential. As a result\, the theoretical angular distributions of transmitted protons are in excellent agreement with the corresponding experimental ones. Possible applications of the rainbow ion–atom interaction potential has been discussed. \n[1] S. Petrović\, L. Miletić\, and N. Nešković\, Theory of rainbows in thin crystals: The explanation of ion channeling applied to Ne10+ ions transmitted through a  thin crystal\, Phys. Rev. B 61\, 184 (2000).\n[2] M. Motapothula\, S. Petrović\, N. Nešković\, Z. Y. Dang\, M. B. H. Breese\, M. A. Rana\, and A. Osman\, Origin of ringlike angular distributions observed in rainbow channeling in ultrathin crystals\, Phys. Rev. B 86\, 205426 (2012).\n[3] J. F. Ziegler\, J. P. Biersack and U. Littmark\, The stopping and range of ions in solids (Pergamon Press\, 1985).\n[4] H. F. Krause\, J. H. Barrett\, S. Datz\, P. F. Dittner\, N. L. Jones\, J. Gomez del Campo\, and C. R. Vane\, Angular distribution of ions axially channeled in a very thin crystal: Experimental and theoretical results\, Phys. Rev. A 49\, 283 (1994).
URL:/event/the-rainbow-ion-solid-interaction-potential/
LOCATION:Aula Seminari\, Via Enrico Fermi\, 40\, Frascati\, Roma\, 00044\, Italia
CATEGORIES:Seminari teorici
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