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- W2062166740 startingPage "4479" @default.
- W2062166740 abstract "Measurements have been made of projectile K-Auger-electron emission during interactions of 60-keV ${mathrm{N}}^{6+}$ ions grazingly incident on a Au(011) single crystal whose work function was modified by submonolayer deposits of Cs. K Auger spectra were obtained for incidence angles in the range 0.3ifmmode^circelsetextdegreefi{}--5ifmmode^circelsetextdegreefi{}, using clean, as well as cesiated, Au surfaces whose work function had been reduced by as much as 3.3 eV. For incidence angles smaller than 5ifmmode^circelsetextdegreefi{}, an enhancement on the above-surface K Auger component, relative to that observed for ``clean'' Au, could be discerned with decreasing surface work function, which appears to saturate below 0.7ifmmode^circelsetextdegreefi{} (corresponding to an inverse perpendicular velocity of about 200 a.u${.}^{mathrm{ensuremath{-}}1}$) at approximately 30--35 %. The experimental results are compared with modeling studies of the work-function dependence of above-surface neutralization and projectile K Auger emission, using a simulation based on the classical over-the-barrier model that was modified to treat the case of a ``two-component'' surface. The simulation results agree qualitatively with the experimental results up to ${mathit{v}}_{mathrm{ensuremath{perp}}}^{mathrm{ensuremath{-}}1}$=200. At higher inverse perpendicular velocities, the simulated enhancement continues to increase and exceeds the clean Au result by more than a factor of 2 at ${mathit{v}}_{mathrm{ensuremath{perp}}}^{mathrm{ensuremath{-}}1}$=1000. Speculations about possible reasons for this discrepancy will be presented." @default.
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- W2062166740 date "1993-12-01" @default.
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- W2062166740 title "Work-function dependence of above-surface neutralization of multicharged ions" @default.
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- W2062166740 doi "https://doi.org/10.1103/physreva.48.4479" @default.
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