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By Nobutami Kasai, M. Kakudo
Advanced undergraduates and postgraduate researchers in macromolecular sciences now not manage to pay for to unusual with X-ray diffractions for acquiring structural info on organic ingredients, typical and artificial excessive polymeric fabrics. This e-book is split into 3 elements: basic, experimental and analytical, and the amount as a complete is meant as an intermediate textbook to bridge the distance among primers and expert works. It offers an intensive therapy of ideas and functions, and provides complete, functional information of experimental equipment and therapy of effects, many together with examples of tangible analysis.
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Extra info for X-Ray Diffraction by Macromolecules
Sample text
30, with < A,„^ > replacing
This integral has the same form as the well-known Fourier integral (hence the term "Fourier space" above). Since the scattering points are generally electrons, p(r) may be taken as the density of the electron distribution at r. This is a single-valued continuous function in real space, and thus satisfies the conditions for Fourier transforms. 14) The integration is carried out in this case over the whole of reciprocal space with a volume element dVs. Whereas Eq. 13 shows that the function A(S) can be derived from the Fourier transform of p(r), Eq.
12). 6. If the scattering substance is a crystal, the scattering amplitude is found by combination of the scattered waves from the atoms of a single unit cell by the method of 5) above. The resultant composite ampHtude is known as the structure factor F{h'k'l') (see Eqs. 42). References 1. 2. 3. 4. M. , Akadimische Verlag, Leipzig (1960). R. W. James, The Optical Principles of the Diffraction ofX-Rays, G. Bell & Sons, London (1954). W. H. , N. Y. (1945). S. ), Asakura, Tokyo (1969) (in Japanese).