Multielement spectrometer for efficient measurement of the momentum transfer dependence of inelastic x-ray scattering

Nonresonant x-ray Raman scattering (XRS) is the inelastic scattering of hard x rays from the K shell of low- Z elements or the less tightly bound shells of heavier elements. In the limit of low momentum transfer q , XRS is determined by the same transition matrix element as is measured by x-ray abso...

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Bibliographic Details
Published in:Review of scientific instruments 2006-06, Vol.77 (6), p.063901-063901-7
Main Authors: Fister, T. T., Seidler, G. T., Wharton, L., Battle, A. R., Ellis, T. B., Cross, J. O., Macrander, A. T., Elam, W. T., Tyson, T. A., Qian, Q.
Format: Article
Language:English
Subjects:
ABSORPTION SPECTROSCOPY
ADVANCED PHOTON SOURCE
DENSITY
ENERGY RESOLUTION
HARD X RADIATION
INELASTIC SCATTERING
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
K SHELL
MAGNESIUM
MATRIX ELEMENTS
MOMENTUM TRANSFER
MULTIPOLE TRANSITIONS
RAMAN EFFECT
RAMAN SPECTRA
SYMMETRY
X-RAY DIFFRACTION
X-RAY SPECTRA
X-RAY SPECTROMETERS
X-RAY SPECTROSCOPY
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Summary:Nonresonant x-ray Raman scattering (XRS) is the inelastic scattering of hard x rays from the K shell of low- Z elements or the less tightly bound shells of heavier elements. In the limit of low momentum transfer q , XRS is determined by the same transition matrix element as is measured by x-ray absorption spectroscopies. However, XRS at higher q can often access higher order multipole transitions which help separate the symmetry of various contributions to the local density of states. The main drawback of XRS is its low cross section-a problem that is compounded for a q -dependent study. To address this issue, we have constructed a multielement spectrometer to simultaneously measure XRS at ten different values of q . By means of example, we report new measurements of the XRS from the L - and K -edges of Mg. This instrument is now available to general users at the Advanced Photon Source as the lower energy resolution inelastic x-ray scattering (LERIX) spectrometer.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.2204581