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Relativistic Atomic Form Factors and Photon Coherent Scattering Cross Sections by J. H. Hubbell; I. O/verbo/ is a Chemistry article available to read on EtoBox.

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Tabulations are presented of relativistic Hartree•Fock atomic form factors F(x,Z), for values of x (= sin(O 12)/1..) from 0.01 to 10 9 A -1, for all elements Z-1 to 100. For Z= 1, F(x,Z) iG giyen by the exaet expression of Pircnnc. For 2=2 to 98, x=O.OI to 2.0 A -\ the tabulated values are those of Cromer and Waber given ,in the International Tables for X-Ray Crystallography (Vol. IV, 1974), based in part on the work of Doyle and Turner. For Z=21 to 92, x= 2.2 to 6.0 A -1, the present tables are based on the values of Doyle and Turner and additional values (Z=44, 60, 68, and 74) nsgiven by0verb&. ForZ-3 to20,x=2.2 to15 A-I, a~l{12':"21 to92,x-6.2 to 45 A -lthetable., are interpolated from values given for 36 elements hy 0verbtS. extended to x=10 9 A-l using 0verbtS's corrections to the Bethe-Levinger K-shell expression. The remainder of the table is filled in by interpolation and extrapolation, guided for high x-values by the Bethe.Levinger result. Tables of relativistic coherent (Rayleigh) scattering cross sections, obtained by numerical integr.:.tion of the Thomson formula weighted by F2(x,Z), are presented for all ele'ments 2=1 to 100, for photon energies 100 eV (11.= 124 A= 12.

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Author

J. H. Hubbell; I. O/verbo/

Published

1979

Language

EN

Field

Chemistry (Physical Sciences)