Open AccessMilli‐electronvolt monochromatization of hard X‐rays with a sapphire backscattering monochromator
Author(s) -
Sergueev I.,
Wille H.C.,
Hermann R. P.,
Bessas D.,
Shvyd'ko Yu. V.,
Zając M.,
Rüffer R.
Publication year - 2011
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s090904951102485x
Subject(s) - monochromator , sapphire , crystal (programming language) , scattering , optics , physics , atomic physics , materials science , laser , wavelength , computer science , programming language
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 121 Sb at 37.13 keV, 125 Te at 35.49 keV, 119 Sn at 23.88 keV, 149 Sm at 22.50 keV and 151 Eu 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.