|Author||Henschke, E. B.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|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)|
|Learning Resource Type||Article|
|Publisher Department||Wright Air Development Div., Dayton, Ohio|
|Organization||Wright Air Development Div., Dayton, Ohio|
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