Experimental check of core Compton profiles, calculated using a quasi-self-consistent-field method

In order to check the validity of our core Compton-profile calculations [quasi-self-consistent-field (QSCF) method] beyond the impulse approximation, measurements have been performed at two different energies E₁ of the incident photons (8.2 and 12.86 keV). Compton profiles are obtained on a beryllium single crystal using the synchrotron radiation of LURE. In this paper, it is shown that the QSCF profile satisfies the two requirements: It converges to the impulse-approximation profile as E₁ increases and the valence profile, deduced from the experimental and QSCF profiles, is independent of the energy E₁ (as required by the impulse approximation). We conclude that the QSCF approach is quite satisfactory for this type of experiment.