Table-top ultrafast X-ray microcalorimeter spectrometry for molecular structure
Uhlig, J., Fullagar, W., Ullom, J. N., Doriese, W. B., Fowler, J. W., Swetz, D. S., . . . Sundström, V. (2013). Table-top ultrafast X-ray microcalorimeter spectrometry for molecular structure. Physical Review Letters, 110, 138302. doi:10.1103/PhysRevLett.110.138302
Published inPhysical Review Letters
© 2013 American Physical Society. Published in this repository with the kind permission of the publisher.
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 E ¼ 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 energydispersive detector. This technique will be broadly enabling for time-resolved observations of structural dynamics in photoactive systems.