Multi-channel photodissociation and XUV-induced charge transfer dynamics in strong-field-ionized methyl iodide studied with time-resolved recoil-frame covariance imaging. (25th February 2021)

• Record Type: Journal Article
• Authors: Allum, Felix; Anders, Nils; Brouard, Mark; Bucksbaum, Philip; Burt, Michael; Downes-Ward, Briony; Grundmann, Sven; Harries, James; Ishimura, Yudai; Iwayama, Hiroshi; Kaiser, Leon; Kukk, Edwin; Lee, Jason; Liu, Xiaojing; Minns, Russell S.; Nagaya, Kiyonobu; Niozu, Akinobu; Niskanen, Johannes; O'Neal, Jordan; Owada, Shigeki; Pickering, James; Rolles, Daniel; Rudenko, Artem; Saito, Shu; Ueda, Kiyoshi; Vallance, Claire; Werby, Nicholas; Woodhouse, Joanne; You, Daehyun; Ziaee, Farzaneh; Driver, Taran; Forbes, Ruaridh;
• Is Part Of: Faraday discussions. Volume 228(2021)
• Page Start: 571
• Page End: 596
• Publication Date: 2021-02-25
• Subjects: Chemistry -- Periodicals; Metallurgy -- Periodicals; Electrochemistry -- Periodicals; 540
• DOI: 10.1039/d0fd00115e
• Languages: English
• ISSNs: 1359-6640

Abstract

Abstract : The photodissociation dynamics of strong-field ionized methyl iodide were probed using intense extreme ultraviolet (XUV) radiation produced by the SPring-8 Angstrom Compact free electron LAser. Abstract : The photodissociation dynamics of strong-field ionized methyl iodide (CH3 I) were probed using intense extreme ultraviolet (XUV) radiation produced by the SPring-8 Angstrom Compact free electron LAser (SACLA). Strong-field ionization and subsequent fragmentation of CH3 I was initiated by an intense femtosecond infrared (IR) pulse. The ensuing fragmentation and charge transfer processes following multiple ionization by the XUV pulse at a range of pump–probe delays were followed in a multi-mass ion velocity-map imaging (VMI) experiment. Simultaneous imaging of a wide range of resultant ions allowed for additional insight into the complex dynamics by elucidating correlations between the momenta of different fragment ions using time-resolved recoil-frame covariance imaging analysis. The comprehensive picture of the photodynamics that can be extracted provides promising evidence that the techniques described here could be applied to study ultrafast photochemistry in a range of molecular systems at high count rates using state-of-the-art advanced light sources.