Fluctuations in collision cascades: Ion beam mixing

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

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    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
    Volume115
    Issue number1-4
    DOIs
    Publication statusPublished - 1996
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Ion beams
    cascades
    ion beams
    collisions
    Ion bombardment
    spikes
    bombardment
    Multilayers
    ions
    flux density
    Atoms
    Ions
    atoms
    simulation
    energy
    Monte Carlo simulation

    Cite this

    @article{9c0597d0d85545fdaabf4fed6076f55d,
    title = "Fluctuations in collision cascades: Ion beam mixing",
    abstract = "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.",
    author = "Mikko Hautala and Jari Likonen and Ilkka Koponen",
    note = "Project code: KET4134",
    year = "1996",
    doi = "10.1016/0168-583X(95)01450-0",
    language = "English",
    volume = "115",
    pages = "493--496",
    journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
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    publisher = "Elsevier",
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    }

    Fluctuations in collision cascades : Ion beam mixing. / Hautala, Mikko (Corresponding Author); Likonen, Jari; Koponen, Ilkka.

    In: Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, Vol. 115, No. 1-4, 1996, p. 493-496.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Fluctuations in collision cascades

    T2 - Ion beam mixing

    AU - Hautala, Mikko

    AU - Likonen, Jari

    AU - Koponen, Ilkka

    N1 - Project code: KET4134

    PY - 1996

    Y1 - 1996

    N2 - 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.

    AB - 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.

    U2 - 10.1016/0168-583X(95)01450-0

    DO - 10.1016/0168-583X(95)01450-0

    M3 - Article

    VL - 115

    SP - 493

    EP - 496

    JO - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

    JF - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

    SN - 0168-583X

    IS - 1-4

    ER -