Abstract
Discrepancies between experimental and theoretical results for the shape of the Compton line in X-ray scattering from metallic lithium are examined. The effect of electron correlations on the Compton profile is first examined using the high density momentum distribution of an electron gas as given by Daniel and Vosko. The smallness of the effect leads to an examination of earlier work based on approximate Bloch wave functions. By using experimental binding energies in conjunction with the virial theorem it is shown that the mean kinetic energy of the conduction electrons in lithium is almost certainly overestimated by earlier work and is about 7 eV. Such a figure indicates an even greater discrepancy between theory and experiment.
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