Milli-electronvolt monochromatization of hard X-rays with a sapphire backscattering monochromator

I. Sergueev, H. C. Wille, R. P. Hermann, D. Bessas, Yu V. Shvyd'ko, M. Zajac, R. Rüffer

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

A sapphire backscattering monochromator with 1.1 (1) meV bandwidth for hard X-rays (20-40 keV) is reported. The optical quality of several sapphire crystals has been studied and the best crystal was chosen to work as the monochromator. The small energy bandwidth has been obtained by decreasing the crystal volume impinged upon by the beam and by choosing the crystal part with the best quality. The monochromator was tested at the energies of the nuclear resonances of 121Sb at 37.13 keV, 125Te at 35.49 keV, 119Sn at 23.88 keV, 149Sm at 22.50 keV and 151Eu at 21.54 keV. For each energy, specific reflections with sapphire temperatures in the 150-300 K region were chosen. Applications to nuclear inelastic scattering with these isotopes are demonstrated.

Original languageEnglish
Pages (from-to)802-810
Number of pages9
JournalJournal of Synchrotron Radiation
Volume18
Issue number5
DOIs
StatePublished - Sep 2011
Externally publishedYes

Keywords

  • X-ray optics
  • backscattering
  • energy resolution
  • inelastic scattering
  • monochromator
  • sapphire

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