Title :
X-ray absorption spectroscopy of iron tris(bipyridine) using superconducting microcalorimeters
Author :
Ullom, Joel N. ; Dowell, M. ; Fowler, J. ; Miaja, L. ; O´Neil, G. ; Silverman, K. ; Swetz, D. ; Sagar, D.M. ; Yoon, Z. ; Jimenez, R. ; Uhlig, J. ; Fullagar, W. ; Kurunthu, D. ; Mandal, Uttam ; Sundstrom, V.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
We are developing a tabletop apparatus for time-resolved X-ray absorption spectroscopy. Short X-ray pulses are generated by focusing a pulsed 800 nm laser onto a water jet target. X-rays that pass through a sample of interest are detected using energy-resolving superconducting microcalorimeter detectors. We have successfully observed EXAFS features from iron tris(bipyridine) in a water solution. We discuss details of the microcalorimeter spectra and describe the steps that remain before the intrinsic sub-picosecond sensitivity of the apparatus can be realized.
Keywords :
EXAFS; X-ray spectroscopy; calorimeters; superconducting devices; time resolved spectroscopy; EXAFS features; energy-resolving superconducting microcalorimeter detectors; intrinsic subpicosecond sensitivity; iron tris(bipyridine); microcalorimeter spectra; short X-ray pulses; tabletop apparatus; time-resolved X-ray absorption spectroscopy; water jet target; water solution; wavelength 800 nm; Absorption; Iron; Optical pulses; Optical pumping; Optical sensors; Spectroscopy; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2014 Conference on
Conference_Location :
San Jose, CA
