Determination of the X-ray Scattering Cross Section and the imaginary part of the form factor of Nickel

Abstract

In this paper x-ray mass attenuation coefficients of nickel were measured with precision between 0.2% and 0.5% for four characteristic wavelengths: copper and molybdenum K lines. The mass photoelectric absorption coefficients were determined by subtracting the calculated coherent and incoherent scattering from the total scattering and the values of measured attenuation coefficients. The values of the imaginary component of atomic scattering factor for x-ray in nickel were determined from the difference between the values of measured attenuation coefficients and theoretical calculations, it is shown that In the low energy at ω ≪ ωe, and the high energy at ω ≫ ωe, the imaginary component approximately is zero, and the electrons are so tightly bound to the atom. In the region ω ˜ ωe where the imaginary component of the scattering is dominate and the electron become highly absorbing. There was good agreement between the values of the imaginary component of atomic scattering factor has been found and the theoretical FFAST (Chantler, 1995) tabulated values..