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- W2055657982 startingPage "4431" @default.
- W2055657982 abstract "Photoemission spectra of the $3d$ valence band of polycrystalline Cu were studied using synchrotron radiation of energy $50ensuremath{le}hensuremath{nu}ensuremath{le}175$ eV. The detailed shape of the spectrum was found to change distinctly with photon energy. The observed energy dependence was compared to calculated photoemission energy distributions (PED's) assuming a direct transition model. PED's obtained with this model predicted the experimental intensity distribution quite well for $hensuremath{nu}<70$ eV and $hensuremath{nu}>120$ eV but failed in the region $hensuremath{nu}ensuremath{approx}90$ eV. Fair agreement between experiment and theory was obtained when momentum broadening in the final state was included. The largest broadening was required around $hensuremath{nu}=90$ eV. A minimum in the photoelectron mean free path at this energy is discussed as a possible source of broadening. The observed changes in spectral shape for $50ensuremath{le}hensuremath{nu}ensuremath{le}70$ eV are attributed to direct transitions; the changes are found to arise mainly from the angular part of the transition matrix element." @default.
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- W2055657982 date "1976-11-15" @default.
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- W2055657982 title "Photoemission from Cu valence bands using 50-175-eV synchrotron radiation" @default.
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- W2055657982 doi "https://doi.org/10.1103/physrevb.14.4431" @default.
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