High-contrast sub-millivolt inelastic X-ray scattering for nano- and mesoscale science

Yuri Shvyd’ko (), Stanislav Stoupin, Deming Shu, Stephen P. Collins, Kiran Mundboth, John Sutter and Martin Tolkiehn
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Yuri Shvyd’ko: Advanced Photon Source, Argonne National Laboratory
Stanislav Stoupin: Advanced Photon Source, Argonne National Laboratory
Deming Shu: Advanced Photon Source, Argonne National Laboratory
Stephen P. Collins: Diamond Light Source Ltd, Didcot
Kiran Mundboth: Diamond Light Source Ltd, Didcot
John Sutter: Diamond Light Source Ltd, Didcot
Martin Tolkiehn: DESY, Notkestrasse 85, 22607 Hamburg, Germany

Nature Communications, 2014, vol. 5, issue 1, 1-6

Abstract: Abstract Photon and neutron inelastic scattering spectrometers are microscopes for imaging condensed matter dynamics on very small length and time scales. Inelastic X-ray scattering permitted the first quantitative studies of picosecond nanoscale dynamics in disordered systems almost 20 years ago. However, the nature of the liquid-glass transition still remains one of the great unsolved problems in condensed matter physics. It calls for studies at hitherto inaccessible time and length scales, and therefore for substantial improvements in the spectral and momentum resolution of the inelastic X-ray scattering spectrometers along with a major enhancement in spectral contrast. Here we report a conceptually new spectrometer featuring a spectral resolution function with steep, almost Gaussian tails, sub-meV (≃620 μeV) bandwidth and improved momentum resolution. The spectrometer opens up uncharted space on the dynamics landscape. New results are presented on the dynamics of liquid glycerol, in the regime that has become accessible with the novel spectrometer.

Date: 2014
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DOI: 10.1038/ncomms5219

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