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

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      Monochromatization of hard X-rays in the 20–40 keV energy range to ∼1 meV bandwidth using a sapphire backscattering monochromator is demonstrated.


      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.

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      Author and article information

      [a ]European Synchrotron Radiation Facility, F-38043 Grenoble, France
      [b ]Deutsches Elektronen-Synchrotron, D-22607 Hamburg, Germany
      [c ]Jülich Center for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
      [d ]Faculté des Sciences, Université de Liège, B-4000 Liège, Belgium
      [e ]Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
      [f ]Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, 30-059 Kraków, Poland
      Author notes
      Correspondence e-mail: sergueev@
      J Synchrotron Radiat
      J. Synchrotron Rad.
      Journal of Synchrotron Radiation
      International Union of Crystallography
      01 September 2011
      20 July 2011
      20 July 2011
      : 18
      : Pt 5 ( publisher-idID: s110500 )
      : 802-810
      JSYRES S090904951102485X
      © I. Sergueev et al. 2011

      This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

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