TY  - JOUR
AU  - Sergueev, I.
AU  - Wille, H.-C.
AU  - Hermann, R.
AU  - Bessas, D.
AU  - Shvydko, Y. V.
AU  - Zajac, M.
AU  - Rüffer, R.
TI  - Milli-electronvolt monochromatization of hard X-rays with a sapphire backscattering monochromator
JO  - Journal of synchrotron radiation
VL  - 18
SN  - 0909-0495
CY  - Chester
PB  - IUCr
M1  - PreJuSER-15942
SP  - 802 - 810
PY  - 2011
N1  - 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'.
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:21862862
C2  - pmc:PMC3258116
UR  - <Go to ISI:>//WOS:000294821600017
DO  - DOI:10.1107/S090904951102485X
UR  - https://juser.fz-juelich.de/record/15942
ER  -