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Title: Effects of surface undulations on asymmetric X-ray diffraction: a rocking-curve topography study

Journal Article · · Journal of Applied Crystallography (Online)
 [1];  [2];  [1];  [1];  [1];  [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  2. Ecopulse, Inc., Springfield, VA (United States)
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The results are reported of an X-ray diffraction study of an Si crystal designed and fabricated for very asymmetric diffraction from the 333 reflection for X-ray energies of 8.100 and 8.200 keV. A crystal with an asymmetry angle of 46 ± 0.1° between the surface and the (111) planes was studied. The grazing angles of incidence were near 1.08 and 0.33° for these two energies, respectively. Features arising from surface undulations were not observed at 8.100 keV, but were observed at 8.200 keV. The results at 8.100 keV allow an alternative explanation based on strain near the surface to be ruled out. Topographic images were obtained as a function of rocking angle, and in the case of 8.200 keV the surface morphology is evident. Finally, the results are found to be in agreement with dynamical X-ray diffraction calculations made with the Takagi–Taupin equations specialized to a surface having convex or concave features, as reported in the accompanying paper [Macrander (2020). J. Appl. Cryst.53, 793–799].

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1660738
Journal Information:
Journal of Applied Crystallography (Online), Vol. 53, Issue 3; ISSN 1600-5767
Publisher:
International Union of CrystallographyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

References (10)

Dynamical Diffraction of X Rays by Perfect Crystals journal July 1964
XXXIV. The theory of X-ray reflexion journal February 1914
Takagi–Taupin dynamical X-ray diffraction simulations of asymmetric X-ray diffraction from crystals: the effects of surface undulations journal May 2020
Strain mapping with parts-per-million resolution in synthetic type-Ib diamond plates journal November 2005
Zur Begründung der Kristalloptik journal January 1916
Zur Begründung der Kristalloptik journal January 1917
Pendellösung Fringes of X-Rays in Bragg Case journal July 1969
Phase objects in synchrotron radiation hard x-ray imaging journal January 1996
Assessment of the use of a diffuser in propagation-based x-ray phase contrast imaging journal January 2010
On the requirements to the instrumentation for the new generation of the synchrotron radiation sources. Beryllium windows
  • Snigirev, A.; Snigireva, I.; Kohn, V. G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 370, Issue 2-3 https://doi.org/10.1016/0168-9002(95)00849-7
journal February 1996

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Related Subjects

36 MATERIALS SCIENCE
x-ray rocking curves
x-ray topography
surface morphology
silicon crystals