Angular distribution of photoelectrons from silver bromide and metallic silver through the Cooper minimum

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Abstract
Using polarized synchrotron radiation, angle-resolved photoemission data were obtained on randomly oriented polycrystalline AgBr and on thick films of metallic silver. Asymmetry parameters as well as relative cross sections were determined for the valence bands of both systems from 55 eV through the Ag 4d Cooper minimum at 140 eV. Comparison of asymmetry parameters with atomic data indicates that the valence bands derived from Ag 4d levels in these systems are remarkably atomiclike. In AgBr only the uppermost valence bands show a greatly reduced excursion of the β value through the Cooper minimum.

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