International
Tables for Crystallography Volume C Mathematical, physical and chemical tables Edited by E. Prince © International Union of Crystallography 2006 |
International Tables for Crystallography (2006). Vol. C. ch. 7.4, p. 659
|
This statistical model of the atomic charge density (Thomas, 1927; Fermi, 1928
) considerably simplifies the calculation of coherent and incoherent scattering factors since both can be written as universal functions of K and Z. Numerical values were first calculated by Bewilogua (1931
); more recent calculations have been made by Brown (1966
) and Veigele (1967
). The method is less accurate than Waller–Hartree theory, but it is a much simpler computation.
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