FIRST RESULTS FROM ATTOSECOND X-RAY PUMP-PROBE EXPERIMENTS IN LIQUIDS

Li, Shuai

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https://hdl.handle.net/2142/122581 Copy

Description

Title

FIRST RESULTS FROM ATTOSECOND X-RAY PUMP-PROBE EXPERIMENTS IN LIQUIDS

Author(s)

Li, Shuai

Contributor(s)

• Inhester, Ludger
• Santra, Robin
• DePonte, Dan
• Cryan, James
• Marineili, Ago
• Dakovski, Georgi
• Lin, Ming-Fu
• Moeller, Stefan P.
• Li, Xiaosong
• Lu, Lixin
• Pearce, Carolyn
• Nienhuis, Emily
• Young, Linda
• Doumy, Gilles
• Li, Kai

Issue Date

2023-06-20

Keyword(s)

Mini-symposium: Spectroscopy at Large-scale Facilities

Abstract

Understanding the elementary steps following ion-ization in aqueous systems provides a framework for radiation-matter interactions in chemistry and biology. However, a microscopic understanding of the reaction mechanisms in the relevant physico-chemical time regime is missing as typical techniques, EPR, and UV spectroscopies, lack either time resolution or spectral clarity. A powerful two-color sub-femtosecond time-resolved X-ray pump/X-ray probe scheme developed at LCLS provides a qualitatively new window to systematically understand the electronic and nuclear dynamics following outer-, inner-valence, and core ionization in aqueous systems. Recently we investigated radiation-induced reactions in liquid water by X-ray transient absorption in a sheet jet using sub-fs XLEAP pulses on the ChemRIXS beamline at LCLS. The x-ray pump (255 eV to 275 eV) produces outer- and inner-valence holes, and the probe (510-550 eV) covers the valence hole through oxygen K-edge absorption. Starting from 0.6 fs delay absorption spectra were measured to capture ultrafast processes, e.g. Auger decay, intermolecular Coulombic decay (ICD), electron transfer mediated decay (ETMD), and proton transfer.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122581

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