Abstract
Compton profiles of glassy carbon and polycrystalline graphite were measured with AgKα-fluorescence radiation and a LiF 400 analyzer at a scattering angle of 160°. After some corrections, the projections of the momentum densities for the valence electrons as well as the radial-momentum densities are obtained. The valence electron configurations show differences by comparing the individual profiles. A comparison with free-atom Hartree-Fock calculations demonstrates that the electronic state of glassy carbon is closer to the free atomic model than graphite.