3D electron momentum densities: a comparision of ( #gamma# , e #gamma# ) and (e,2e) spectroscopy

摘要

We report on the comparison of a ( #gamma# , e #gamma# ) with a (e,2e) experiment made with the same 17 nm thin graphite foil. Good overall agreement is observed between both methods and the resulting 3D elelctron momentum density is well reproduced by a pseudo-potential calculation. The remaining differences between the (e,2e) and ( #gamma# , e #gamma# ) results are discussed in terms of multiple elastic electron scattering which might affect the (e,2e) data.