Direct momentum imaging of charge transfer following site-selective ionization

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

*Corresponding author for this work

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

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Abstract

We study ultrafast charge rearrangement in dissociating 2-iodopropane (2−C3H7I) using site-selective core ionization at the iodine atom. Clear signatures of electron transfer between the neutral propyl fragment and multiply charged iodine ions are observed in the recorded delay-dependent ion momentum distributions. The detected charge-transfer pathway is only favorable within a small (few angstroms), charge-state-dependent spatial window located at C-I distances longer than that of the neutral ground-state molecule. These results offer insights into the physics underpinning charge transfer in isolated molecules and pave the way for a different class of time-resolved studies.
Original languageEnglish
Article number043113
Number of pages16
JournalPhysical Review A
Volume108
Issue number4
DOIs
Publication statusPublished - 23 Oct 2023

Bibliographical note

Funding Information:
The experiment was performed at SACLA with the approval of JASRI and the program review committee (Proposal No. 2021A8038 Forbes). We thank the technical and scientific staff of SACLA for their hospitality and support before and during the beam time. R.F. and F.A. gratefully acknowledge support from the Linac Coherent Light Source, SLAC National Accelerator Laboratory, which is supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-76SF00515. D.R. and A.R. were supported by Contract No. DE-FG02-86ER13491 from the same funding agency. J.W.L.L. acknowledges financial support via the Helmholtz-ERC Recognition Award (Award No. ERC-RA-0043) of the Helmholtz Association (HGF). B.D.W. thanks the CLF and the University of Southampton for a studentship. R.S.M. thanks the EPSRC for financial support (Grant No. EP/R010609/1). J.M., M.Bro., D.M., D.H., P.A.R., C.V., and A.J.O.E. gratefully acknowledge the support of EPSRC Programme Grant No. EP/V026690/1. M.Bu. and T.W. are also grateful to EPSRC for support from Grant No. EP/S028617/1. T.W. is additionally thankful to EPSRC for studentship funding and Jesus College, Oxford, for a partial fee scholarship. P.H.B., A.J.H., and M.Bri. were supported by the National Science Foundation. J.N. acknowledges Academy of Finland funding via Project No. 331234. Y.K. acknowledges support by JSPS KAKENHI Grant No. 20K14427.

Publisher Copyright:
© 2023 American Physical Society.

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