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- W1973608014 abstract "The electron-stimulated-desorption ion angular distributions (ESDIAD) of positive ions, negative ions, and metastable species from ${mathrm{PF}}_{3}$ and K coadsorbed on a Ru(0001) surface are measured. In the absence of K, only positive- and negative-ion ESDIAD is observed, showing highly anisotropic, off-normal fluorine-ion emission (${mathrm{F}}^{+}$, ${mathrm{F}}^{mathrm{ensuremath{-}}}$) from ${mathrm{PF}}_{3}$, which demonstrates that PF bonds are inclined away from the surface normal. In the presence of K, ESDIAD patterns of ${mathrm{F}}^{+}$, ${mathrm{F}}^{mathrm{ensuremath{-}}}$, and metastable ${mathrm{F}}^{mathrm{*}}$ display only normal emission, suggesting a reorientation or chemical reaction which results in fluorine bonding perpendicular to the surface. Thermal desorption spectrometry, Auger electron spectroscopy, and soft-x-ray photoemission (SXPS) are used to determine the surface chemistry as an aid in intepreting the ESDIAD results. The SXPS data show that in the presence of potassium, ${mathrm{PF}}_{3}$ dissociates, possibly forming KF-like species, which suggests that an alkali-metal-induced chemical reaction is reponsible for the changes observed in ESDIAD. The yields of the various desorbed fluorine species vary strongly with potassium coverage; the results for ${mathrm{F}}^{mathrm{ensuremath{-}}}$ and ${mathrm{F}}^{mathrm{*}}$ are interpreted in terms of a charge-transfer model." @default.
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- W1973608014 date "1992-06-15" @default.
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- W1973608014 title "Influence of coadsorbed potassium on the electron-stimulated desorption of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>F</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>,<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>F</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>−</…" @default.
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- W1973608014 doi "https://doi.org/10.1103/physrevb.45.14264" @default.
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