Comment on X-Ray Inelastic Scattering of Li Metal in the Region of Intermediate Momentum Transfer

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Abstract
The observation of a peak near the Fermi energy in the x-ray inelastic scattering spectrum of lithium has been variously explained as resulting from optical transitions in lithium, and as being attributable to an "oil-Mylar" protective cover. A new experiment sensitive to the surface impurities of the scattering sample and insensitive to instrumental distortion demonstrates that the observed feature is not due to oil or Mylar but rather arises from the lithium scattering process.