%0 Journal Article
%A Sergueev, I.
%A Wille, H.-C.
%A Hermann, R.
%A Bessas, D.
%A Shvydko, Y. V.
%A Zajac, M.
%A Rüffer, R.
%T Milli-electronvolt monochromatization of hard X-rays with a sapphire backscattering monochromator
%J Journal of synchrotron radiation
%V 18
%@ 0909-0495
%C Chester
%I IUCr
%M PreJuSER-15942
%P 802 - 810
%D 2011
%Z The authors are very grateful to A. I. Chumakov for support during the experiment and for helpful discussions. RPH and DB acknowledge support from the Helmholtz Gemeinschaft Deutscher Forschungzentren for the Helmholtz University Young Investigator Group Lattice Dynamic in Emerging Functional Materials and from the DFG priority program SPP1386 'Nanostructured Thermoelectrics'.
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:21862862
%2 pmc:PMC3258116
%U <Go to ISI:>//WOS:000294821600017
%R 10.1107/S090904951102485X
%U https://juser.fz-juelich.de/record/15942