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- W2070796587 startingPage "10990" @default.
- W2070796587 abstract "Photon emission spectra from the ${mathit{np}}^{5}$(n+1)sensuremath{rightarrow}${mathit{np}}^{6}$ transitions of core-excited Kr (n=4) and Xe (n=5) impurities in host alkali metals are reported. A band arising from the decay of single rare-gas atoms is identified, as well as features characteristic of interaction between neighboring impurity atoms. Lifetimes determined from emission intensities relative to the analogous core excitation in the host metal were found to be roughly constant at ensuremath{sim}5 meV in all the alloys studied. The Lorentzian component of the emission edge is considerably wider at almost 200 meV. These model systems have previously been studied in absorption where an anomalously broad and suppressed Fermi edge was found, in contrast to the predicted ``x-ray-edge'' singularity. Emission results for isolated impurities show small overlap with the corresponding absorption edges, and the usual mirror symmetry of the two edges is entirely absent. The effect of configuration interaction is discussed as a possible explanation for the anomalous absorption threshold, rather than shakeup from conduction-electron recoil as previously supposed." @default.
- W2070796587 created "2016-06-24" @default.
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- W2070796587 date "1990-12-15" @default.
- W2070796587 modified "2023-09-26" @default.
- W2070796587 title "Vacuum-ultraviolet emission from rare-gas impurities in alkali metals" @default.
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- W2070796587 doi "https://doi.org/10.1103/physrevb.42.10990" @default.
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