Sputtering of the most volatile solids: The solid hydrogens

Jørgen Schou, B. Stenum, O. Ellegaard, R. Pedrys, L. Dutkiewicz

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Electronic sputtering of the three stable hydrogenic solids, H-2, HD and D-2 by keV hydrogen and deuterium ions has been studied at the low-temperature setup at Riso. The yield of the sputtered particles has been determined for hydrogenic films of thicknesses ranging from 0.1 X 10(18) up to 10 X 10(18) molecules/cm(2) and for 4-10 keV H+, H-2(+), H-3(+) and D-3(+) ions. The yield increases with decreasing firm thickness for solid hydrogen as well as for deuterium. This behavior agrees with the trend observed for other volatile gases. For thick films the yield decreases to a constant value. This thick-film yield can be approximated fairly well by a quadratic function of the stopping power except for a somewhat steeper dependence for proton-bombarded deuterium. The yield increases strongly with decreasing sublimation energy from one isotope to another. No existing theory can account for the dependence of the yield on the electronic stopping power as well as the sublimation energy.
    Original languageEnglish
    JournalNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
    Volume100
    Issue number2-3
    Pages (from-to)217-223
    ISSN0168-583X
    DOIs
    Publication statusPublished - 1995
    Event10th International Workshop on Inelastic Ion-Surface Collisions (IISC-10) - Grand Targhee, WY, United States
    Duration: 8 Aug 199412 Aug 1994
    Conference number: 10

    Conference

    Conference10th International Workshop on Inelastic Ion-Surface Collisions (IISC-10)
    Number10
    CountryUnited States
    CityGrand Targhee, WY
    Period08/08/199412/08/1994

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