Carbon K soft-x-ray emission spectra of LiC₆, KC₈, and CsC₈ are presented. An absolute value for the charge transfer from the alkali metal to the carbon {π} band is obtained. A model fit to the data reveals similar effects on both spectral shape and threshold energy, independent of the choice of the alkali-metal intercalant, and provides a measure of departures from the rigid-band approximation. An enhancement of the soft-x-ray emission spectrum near EF is reported.
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Mansour et al. (1987) studied this question.
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