Time-resolved x-ray spectroscopy for x-ray-induced phenomena

Antonio Picón

doi:10.1117/12.2265783

17 May 2017 Time-resolved x-ray spectroscopy for x-ray-induced phenomena

Antonio Picón

Proceedings Volume 10243, X-ray Lasers and Coherent X-ray Sources: Development and Applications; 102430K (2017) https://doi.org/10.1117/12.2265783
Event: SPIE Optics + Optoelectronics, 2017, Prague, Czech Republic

Abstract

X-ray-pump/x-ray-probe spectroscopy allows investigation of ultrafast x-ray induced molecular dynamics. X-ray absorption and Auger decay leave molecules in manifolds of transient intermediate states in the femtosecond time scale. By using an x-ray probe pulse, we can image nuclear wavepackets as a function of time using ion-ion coincidence spectroscopy to record ion momentum distributions and kinetic energy releases (KERs). Numerical simulations, a timedependent approach that includes both K-shell photoionization and Auger decay, show how the transient intermediate states are projected onto the KERs. At short time delays, the measurements are sensitive to interatomic interactions, whereas at longer delays the contribution from separated ions due to dissociative intermediate states becomes observable. We present simulations for the nitrogen molecule. These simulations have the potential to be extended to more complex molecules.

Citation Download Citation

Antonio Picón "Time-resolved x-ray spectroscopy for x-ray-induced phenomena", Proc. SPIE 10243, X-ray Lasers and Coherent X-ray Sources: Development and Applications, 102430K (17 May 2017); https://doi.org/10.1117/12.2265783

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