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  • International Union of Crystallography (IUCr)  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Simultaneous diffraction: Umweganregung peaks in the case of a vibrating single crystal (1979)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 35 (1979), S. 962-965 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The positive diffraction intensity changes on forbidden (222) planes of a vibrating single crystal of Si, which are produced by simultaneous diffraction, are experimentally treated for the symmetric Laue case. The neutron diffraction experiment was performed for a flexurally vibrating as well as a non-vibrating perfect silicon bar. Several Umweganregung peaks were observed after exciting the bar into vibration while no Umweganregung peak was observed in the case of a non-vibrating crystal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S056773947900214X
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
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    Multiple Bragg reflections of neutrons in an elastically deformed single crystal (1981)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 37 (1981), S. 459-465 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The large positive diffraction intensity changes on forbidden (222) planes, which are produced by simultaneous diffraction, were observed when a perfect Si single crystal was excited into vibration. The excited Umweganregung effect is of the same order as the diffraction intensity obtained on (111) planes under the same experimental conditions. The theoretical consideration is an extension of the lamellae model usually used in the two-wave approximation. Both the theory and the experimental results demonstrate that such an effect may cause very large errors especially in diffraction experiments with non-perfect single crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739481001125
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    Paper (German National Licenses)
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