Table-top ultrafast X-ray microcalorimeter spectrometry for molecular structure
Uhlig, J., Fullagar, W., Ullom, J., Doriese, W., Fowler, J., Swetz, D., Gador, N., Canton, S., Kinnunen, K., Maasilta, I., Bennett, C. D., Vale, L., Hilton, G., Irwin, K., Schmidt, D., & Sundström, V. (2013). Table-top ultrafast X-ray microcalorimeter spectrometry for molecular structure. Physical Review Letters, 110, Article 138302. https://doi.org/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.