STP870

    Direct Observation of Cascade Defect Formation at Low Temperatures in Ion-Irradiated Metals

    Published: Jan 1985


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    Abstract

    Direct transmission electron microscopy observations of cascade defect formation have been carried out in gold, Type 316 stainless steel, and aluminum irradiated by Al+, Ar+, and Xe+ ions with energies between 80 and 400 ke V. By utilizing a link of an ion accelerator to an electron microscope, in situ observations at low temperature (-150°C) have become possible. In gold, subcascade structures are clearly observed in all cases. Obvious dependence on projectile mass and energy is observed for cascade structure and vacancy clustering efficiency in gold and for defect visibility in aluminum and Type 316 stainless steel. A computer simulation calculation using MARLOWE shows subcascade distributions a little smaller in size and larger in number than the present observation.

    Keywords:

    radiation, cascade, cascade collapse, cascade overlap, subcascade, ion irradiation, gold, aluminum, Type 316 stainless steel, clustering efficiency, computer simulation, damage correlation


    Author Information:

    Muroga, T
    Graduate student, graduate student, and professor, University of TokyoInterdisciplinary Graduate School of Engineering Sciences, Kyushu University, TokyoKasuga,

    Hirooka, K
    Graduate student, graduate student, and professor, University of TokyoInterdisciplinary Graduate School of Engineering Sciences, Kyushu University, TokyoKasuga,

    Ishino, S
    Graduate student, graduate student, and professor, University of TokyoInterdisciplinary Graduate School of Engineering Sciences, Kyushu University, TokyoKasuga,


    Paper ID: STP37376S

    Committee/Subcommittee: E10.08

    DOI: 10.1520/STP37376S


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