The atomic incoherent scattering intensities of boron, oxygen and carbon

In X-ray investigations of the structures of noncrystalline materials, rehable values of the incoherent scattering intensity are required. The availability of ttartree-Fock wave functions and automatic computing equipment has permitted the calculation of atomic incoherent scattering intensities using the complete scattering function including off-diagonal elements (Waller & Hartree, 1929). Recently, a calculation of this type has been made for carbon in the valence state by Keating & Vineyard (1956). Their results differed considerably from previously available values (Compton & Allison, 1935) and agreed quite well with experimental values (Laval, 1939). In view of this, the atomic incoherent scattering intensities for boron, oxygen and carbon in their respective ground states have been computed from the complete scattering function. Omitting the Breit-Dirac correction, the incoherent scattering intensity for an atom, in terms of the Thomson electron, is