Complex lattice potentials in electron diffraction calculated for a number of crystals

Structure potentials, V_g, and absorption potentials for 100 keV-electrons are given in tabulated form for almost all monatomic crystals with elements Z = 3 to 90 and for a number of crystals of the rock-salt type. The absorption potentials are given in the form of the Fourier coefficients Cⁱ_0g of the Yoshioka imaginary potential for excitation of crystal electrons and excitation of phonons at the temperatures 20, 93 and 293 °K. All computations are based on numerical Hartree-Fock-Slater atomic radial functions by Herman & Skillman (Atomic Structure Calculations. Englewood Cliffs: Prentice Hall, 1963). The calculations show that the ratio Cⁱ_0g(el)/V_g, where Cⁱ_0g(el) refers to excitation of single-crystal electrons, lies between 0.005 and 0.012 for the lower reflexion vectors g and practically all Z. In contrast to this the ratio Cⁱ_0g(phonon)/V_g is much larger and increases about linearly with Z, for a given g.