Fluctuations in collision cascades: Ion beam mixing

Mikko Hautala (Corresponding Author), Jari Likonen, Ilkka Koponen

    Research output: Contribution to journalArticleScientificpeer-review


    We have studied the consequences of statistical fluctuations in collision cascades on mixing of atoms in dense collision cascades. The distributions of energy densities in spherical and cylindrical spikes are obtained from Monte Carlo simulations of collision cascades where a simple model is used for grouping recoils into separate subcascades. The subcascades are approximated as either spherical or cylindrical. In the latter case we find a decrease by a factor of ten and two in the mixing rate when Au is mixed by 7 MeV Ag and 650 keV Kr ions, respectively, if the mean energy deposition is used instead of distribution. New experimental results from 7 MeV Ag ion bombardment of AuPt multilayers at 12 and 300 K are reported. The calculated values for mixing rates agree with the measured values.
    Original languageEnglish
    Pages (from-to)493-496
    Number of pages4
    JournalNuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
    Issue number1-4
    Publication statusPublished - 1996
    MoE publication typeA1 Journal article-refereed


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