Abstract
From our measured differential cross section of Rayleigh scattering, the form factor for momentum transfers in the range 1 A ̊ −1 ≤ x ≤ 50 A ̊ −1 was deduced. Data for U, Pb, Pt, W, Sn, Cd, Ag, Mo and Cu at energies from 60 to 662 keV and scattering angles ranging from 5° to 140° were used. In addition, for the region 1 A ̊ −1 ≤ x ≤ 50 A ̊ −1 of momenta, experimental data from other authors at higher energies were analyzed. The experimental values obtained were compared with various form-factor theories and limits of validity are established. For the relativistic modified form factor G a good agreement always exists for θ ≤ 65°, independently of energy and atomic number.
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