Atomic form factors, incoherent scattering functions, and photon scattering cross sections
Tabulations are presented of the atomic form factor, F ($alpha$,Z), and the incoherent scattering function, S (x,Z), for values of x (=sin theta/2)/ lambda) from 0.005 A$sup -1$ to 10$sup 9$ A$sup -1$, for all elements A=1 to 100. These tables are constructed from available state-of-the-art theoretical data, including the Pirenne formulas for Z=1, configuration-into action results by Brown using Brown-Fontana and Weiss correlated wavefunctions for Z=2 to 6 non- relativistic Hartree-Fock results by Cromer for Z=7 to 100 and a relativistic K- shell analytic expression for F (x,Z) by Bethe Levinger for x>10 A$sup -1$ for all elements Z=2 to 100. These tabulated values are graphically compared with available photon scattering angular distribution measurements. Tables of coherent (Rayleigh) and incoherent (Compton) total scattering cross sections obtained by nummerical integration over combinations of F$sup 2$(x,Z) with the Thomson formula and S (x,Z) with the Klum-Nishina Formual, respectively, are presented for all elements Z=1 to 100, for photon energies 100 eV (lambda=124 A) to 100 MeV (0.000124 A). The incoherent scattering cross sections also include the radiative and double-Compton corrections as given by Mork. Similar tables are presented for the special cases of terminally-bonded hydrogen and for the H$sub 2$ molecule, interpolated and extrapolated from values calculated by Stewart et al., and by Bentley and Stewart using Kolos-Roothaan wavefunctions. (AIP)
- Research Organization:
- Institute for Basis Standards, National Bureau of Standards, Washington D. C. 20234
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-33-018410
- OSTI ID:
- 4106681
- Journal Information:
- J. Phys. Chem. Ref. Data, v. 4, no. 3, pp. 471-538, Other Information: Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
N60200 -Physics (Atomic & Molecular)-Atomic & Molecular Properties
640304* -Physics Research-Atomic
Molecular & Chemical Physics-Collision Phenomena
*ATOMS- FORM FACTORS
*COMPTON EFFECT- CROSS SECTIONS
*RAYLEIGH SCATTERING- CROSS SECTIONS
COMPARATIVE EVALUATIONS
HARTREE-FOCK METHOD