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Absolute structure-factor measurements in imperfect single crystals by means of γ-ray diffractometry
An experimental method of measuring absolute structure factors in imperfect single crystals by means of Bragg diffraction of 0.03 Å γ-radiation is presented. It is shown that in principle atomic scattering factors can be deduced with an accuracy of about ±0.5% from rocking curves measured by means of γ-ray diffractometry. Due to the uncertainties in the correction for thermal motion of the atoms, however, the values of the atomic scattering factors of copper at the 220, 2
2 and 333 reflexions could be derived only with an accuracy of ±1%. The measurements were made at room temperature.
2 and 333 reflexions could be derived only with an accuracy of ±1%. The measurements were made at room temperature.
