VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • New features of dislocation images in third-generation synchrotron radiation topographs [Elektronski vir]
    Zontone, F. ...
    Some aspects of the dislocation contrast observed at third-generation synchrotron radiation set-ups are presented. They can be explained by taking into account angular deviation effects on the beam ... propagation, which are visible because of the `almost plane-wave' character of these sources. In particular, we show how the evolution of the direct image width of a dislocation as a function of the sample-to-film distance can allow a complete determination of the Burgers vector, i.e. in sign and modulus. In addition, experimental results obtained in monochromatic beam topography are compared with simulated images calculated assuming plane-wave illumination and are demonstrated to show a satisfactory agreement. The utility of tome aspects of the dislocation contrast observed at third-generation synchrotron radiation set-ups are presented. They can be explained by taking into account angular deviation effects on the beam propagation, which are visible because of the `almost plane-wave' character of these sources. In particular, we show how the evolution of the direct image width of a dislocation as a function of the sample-to-film distance can allow a complete determination of the Burgers vector, i.e. in sign and modulus. In addition, experimental results obtained in monochromatic beam topography are compared with simulated images calculated assuming plane-wave illumination and are demonstrated to show a satisfactory agreement. The utility of the weak-beam technique in enhancing the spatial resolution is demonstrated and a criterion for the selection of experimental conditions depending upon the required spatial resolution, signal-to-noise ratio and exposure time is presented.he weak-beam technique in enhancing the spatial resolution is demonstrated and a criterion for the selection of experimental conditions depending upon the required spatial resolution, signal-to-noise ratio and exposure time is presented.
    Vir: Journal of synchrotron radiation. - ISSN 1600-5775 (Vol. 3, part 4, Jul. 1996, str. 173-184)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 1996
    Jezik - angleški
    COBISS.SI-ID - 136675587

    Povezava(-e):

    https://journals.iucr.org/s/issues/1996/04/00/he0152/he0152.pdf
    DOI

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