Feasibility and review of anomalous X-ray diffraction at long wavelengths in materials research and protein crystallography

Kahn, R.; Carpentier, P.; Berthet-Colominas, C.; Capitan, M.; Chesne, M.-L.; Fanchon, E.; Lequien, S.; Thiaudière, D.; Vicat, J.; Zielinski, P.; Stuhrmann, H.

doi:10.1107/S0909049500000054

Figure 1
The anomalous dispersion of some elements (in electron units). Circles: M_V-edge of uranium in uranyl acetate; squares: L_III-edge of lanthanide ions; triangles: K-edge of phosphorus (DNA); line: K-edge of selenium in selenomethionine. The imaginary part f′′ is plotted versus the real part f′ of the atomic form factor. The points denote f′ + if′′ in the plane of complex numbers at an energy spacing of 0.1 eV. The curves are almost closed circles. Measurement of the diffracted intensity for one Bragg peak at three wavelengths is sufficient for its phase determination.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 7| Part 3| May 2000| Pages 131-138

doi:10.1107/S0909049500000054

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