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Publication Citation: Table-top ultrafast x-ray microcalorimeter spectrometry for molecular structure

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Author(s): Jens (. Uhlig; William B. Doriese; Joseph W. Fowler; Daniel S. Swetz; Carl D. Reintsema; Douglas A. Bennett; Leila R. Vale; Gene C. Hilton; Kent D. Irwin; Joel N. Ullom; Ilari Maasilta; Wilfred Fullagar; Niklas Gador; Sophie Canton; Kimmo Kinnunen; Villy Sundstrom;
Title: Table-top ultrafast x-ray microcalorimeter spectrometry for molecular structure
Published: March 26, 2013
Abstract: This work presents an x-ray absorption measurement by use of ionizing radiation generated by a femtosecond pulsed laser source. The spectrometer was a microcalorimetric array whose pixels are capable of accurately measuring energies of individual radiation quanta. An isotropic continuum x-ray spectrum in the few-keV range was generated from a laser plasma source with a water-jet target. X rays were transmitted through a ferrocene powder sample to the detector, whose pixels have average photon energy resolution {Δ}E=3.14  eV full-width-at-half-maximum at 5.9 keV. The bond distance of ferrocene was retrieved from this first hard-x-ray absorption fine-structure spectrum collected with an energy-dispersive detector. This technique will be broadly enabling for time-resolved observations of structural dynamics in photoactive systems.
Citation: Physical Review Letters
Volume: 110
Pages: 5 pp.
Keywords: laser-plasma, microcalorimeter array, ultrafast, chemistry, X-rays, energy dispersive, EXAFS, ferrocene
Research Areas: Chemical Physics
DOI: http://dx.doi.org/10.1103/PhysRevLett.110.138302  (Note: May link to a non-U.S. Government webpage)
PDF version: PDF Document Click here to retrieve PDF version of paper (691KB)