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Author Henschke, E. B.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ ATOMS ♦ CATHODES ♦ COPPER ♦ DEFECTS ♦ DIAGRAMS ♦ EFFICIENCY ♦ ELECTRIC CHARGES ♦ EMISSION ♦ ENERGY ♦ ENERGY RANGE ♦ GOLD ♦ IONS ♦ LOSSES ♦ MASS ♦ METALS ♦ MOMENTUM ♦ MONOCRYSTALS ♦ QUANTITATIVE ANALYSIS ♦ SILVER ♦ SPUTTERING ♦ TARGETS
Abstract The periodicity of the threshold energies, as seen in a plot vs. atomic number, is more pronounced for threshold energies determined from the part of the yield curve at the lowest ion energies, which obeys a quadratic law, than for "cut-in" energies determined with a linear law from the adjacent somewhat hlgher ion energy range. The relation of the "emapirical sputtering relation'' with the threshold formula is clarified. It is shown that in the case that the rebounding particle is believed to be a displaced target atom, the assumption of a very large "effective" mass of the struck atom must also be made to explain the rebound at angles as observed in ejection patterns of single-crystal planes. Arguments are presented that this model is consistent with the observed higher yields of metals with completely filled d shells, such as copper, silver, and gold, The energy losses connected with the impulses used up in Rebye waves are in good agreement with the energy losses in similar oollisions. (auth)
ISSN 0031899X
Educational Use Research
Learning Resource Type Article
Publisher Date 1961-03-01
Publisher Department Wright Air Development Div., Dayton, Ohio
Journal Physical Review
Volume Number 121
Organization Wright Air Development Div., Dayton, Ohio


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