Atomic Compton profile of neon calculated from an accurate Kohn-Sham potential

The Compton profile of the neon atom is calculated from an accurate Kohn-Sham potential derived from accurate quantum Monte Carlo wave functions. Compared to the experiment, the results are better than the Hartree-Fock ones in the low-wave-vector region. This suggests that the systematic error in the Kohn-Sham formulation in momentum space is relatively small. The first-order Lam-Plazman correction is also calculated. This correction is less than 1% on the average.