Abstract
Interpretation of the lineshape in XPS is often crucial to reliable analysis of core level spectra. A major contributor to the lineshape is thermal broadening of the ground state. The effect of thermal broadening on the linewidth of core level and valence band spectra was explored for a series of alkali metal halides: CsF, CsI, NaF, NaI and related compounds. Variation in temperature from -100 °C to +100 °C led to changes in the linewidths for both core level and valence band spectra. Interpretation of the valence band region was supported by theoretical spectra, simulated using density functional theory.
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