The role of momentum partitioning in covariance ion imaging analysis

Tiffany Walmsley, Joseph McManus, Yoshiaki Kumagai, Kiyonobu Nagaya, James Harries, Hiroshi Iwayama, Michael N R Ashfold, Mathew Britton, Phil Bucksbaum, Briony Downes-Ward, Taran Driver, David Heathcote, Paul Hockett, Andrew Howard, Jason W L Lee, Yusong Liu, Edwin Kukk, Dennis Milesevic, Russell S Minns, Akinobo NiozuJohannes Niskanen, Andrew J Orr-Ewing, Shigeki Owada, Patrick Robertson, Daniel Rolles, Artem Rudenko, Kiyoshi Ueda, James Unwin, Claire Vallance, Mark Brouard, Michael Burt*, Felix Allum*, Ruaridh Forbes*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

We present results from a covariance ion imaging study, which employs extensive filtering on the relationship between fragment momenta to gain deeper insight into photofragmentation dynamics. A new data analysis approach is introduced that considers the momentum partitioning between the fragments of the breakup of a molecular polycation to disentangle concurrent fragmentation channels, which yield the same ion species. We exploit this approach to examine the momentum exchange relationship between the products, which provides direct insight into the dynamics of molecular fragmentation. We apply these techniques to extensively characterize the dissociation of 1-iodopropane and 2-iodopropane dications, prepared by site-selective ionization of the iodine atom using extreme ultraviolet intense femtosecond laser pulses with a photon energy of 95 eV. Our assignments are supported by classical simulations, using parameters largely obtained directly from the experimental data.
Original languageEnglish
Pages (from-to)4548-4560
Number of pages13
JournalJournal of Physical Chemistry A
Volume128
Issue number22
Early online date7 May 2024
DOIs
Publication statusPublished - 6 Jun 2024

Bibliographical note

Publisher Copyright:
© 2024 The Authors. Published by American Chemical Society.

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