Form factor of an open-shell atom

The influence of the nonsphericity of open-shell atoms in the ground state with a total angular momentum J = 3/2 on the theoretical structure of their form factors is examined. It is found that, for the X-ray region of ionization threshold energies of the 1s shell of these atoms, the nonsphericity effects change the absolute values of form factors calculated in the spherically symmetric approximation by a value varying from–2 to +3%.