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UV-induced dissociation of CH2BrI probed by intense femtosecond XUV pulses

Köckert, Hansjochen ; Lee, Jason W.L. ; Allum, Felix ; Amini, Kasra ; Bari, Sadia ; Bomme, Cédric ; Brauße, Felix ; Brouard, Mark ; Burt, Michael and Cunha De Miranda, Barbara , et al. (2022) In Journal of Physics B: Atomic, Molecular and Optical Physics 55(1).
Abstract

The ultraviolet (UV)-induced dissociation and photofragmentation of gas-phase CH2BrI molecules induced by intense femtosecond extreme ultraviolet (XUV) pulses at three different photon energies are studied by multi-mass ion imaging. Using a UV-pump-XUV-probe scheme, charge transfer between highly charged iodine ions and neutral CH2Br radicals produced by C-I bond cleavage is investigated. In earlier charge-transfer studies, the center of mass of the molecules was located along the axis of the bond cleaved by the pump pulse. In the present case of CH2BrI, this is not the case, thus inducing a rotation of the fragment. We discuss the influence of the rotation on the charge transfer process using a classical over-the-barrier model. Our... (More)

The ultraviolet (UV)-induced dissociation and photofragmentation of gas-phase CH2BrI molecules induced by intense femtosecond extreme ultraviolet (XUV) pulses at three different photon energies are studied by multi-mass ion imaging. Using a UV-pump-XUV-probe scheme, charge transfer between highly charged iodine ions and neutral CH2Br radicals produced by C-I bond cleavage is investigated. In earlier charge-transfer studies, the center of mass of the molecules was located along the axis of the bond cleaved by the pump pulse. In the present case of CH2BrI, this is not the case, thus inducing a rotation of the fragment. We discuss the influence of the rotation on the charge transfer process using a classical over-the-barrier model. Our modeling suggests that, despite the fact that the dissociation is slower due to the rotational excitation, the critical interatomic distance for charge transfer is reached faster. Furthermore, we suggest that charge transfer during molecular fragmentation may be modulated in a complex way.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
charge transfer, free-electron lasers, ultrafast molecular dynamics
in
Journal of Physics B: Atomic, Molecular and Optical Physics
volume
55
issue
1
article number
014001
publisher
IOP Publishing
external identifiers
  • scopus:85125733887
ISSN
0953-4075
DOI
10.1088/1361-6455/ac489d
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2022 The Author(s). Published by IOP Publishing Ltd.
id
28617817-770f-46d5-8668-defb902d2352
date added to LUP
2022-03-23 14:38:32
date last changed
2024-01-24 14:16:38
@article{28617817-770f-46d5-8668-defb902d2352,
  abstract     = {{<p>The ultraviolet (UV)-induced dissociation and photofragmentation of gas-phase CH2BrI molecules induced by intense femtosecond extreme ultraviolet (XUV) pulses at three different photon energies are studied by multi-mass ion imaging. Using a UV-pump-XUV-probe scheme, charge transfer between highly charged iodine ions and neutral CH2Br radicals produced by C-I bond cleavage is investigated. In earlier charge-transfer studies, the center of mass of the molecules was located along the axis of the bond cleaved by the pump pulse. In the present case of CH2BrI, this is not the case, thus inducing a rotation of the fragment. We discuss the influence of the rotation on the charge transfer process using a classical over-the-barrier model. Our modeling suggests that, despite the fact that the dissociation is slower due to the rotational excitation, the critical interatomic distance for charge transfer is reached faster. Furthermore, we suggest that charge transfer during molecular fragmentation may be modulated in a complex way.</p>}},
  author       = {{Köckert, Hansjochen and Lee, Jason W.L. and Allum, Felix and Amini, Kasra and Bari, Sadia and Bomme, Cédric and Brauße, Felix and Brouard, Mark and Burt, Michael and Cunha De Miranda, Barbara and Düsterer, Stefan and Eng-Johnsson, Per and Erk, Benjamin and Géléoc, Marie and Geneaux, Romain and Gentleman, Alexander S. and Guillemin, Renaud and Goldsztejn, Gildas and Holland, David M.P. and Ismail, Iyas and Journel, Loïc and Kierspel, Thomas and Küpper, Jochen and Lahl, Jan and Mackenzie, Stuart R. and Maclot, Sylvain and Manschwetus, Bastian and Mereshchenko, Andrey S. and Mullins, Terence and Olshin, Pavel K. and Palaudoux, Jérôme and Penent, Francis and Piancastelli, Maria Novella and Rompotis, Dimitrios and Rouzée, Arnaud and Ruchon, Thierry and Rudenko, Artem and Schirmel, Nora and Simon, Marc and Techert, Simone and Travnikova, Oksana and Trippel, Sebastian and Vallance, Claire and Wang, Enliang and Wiese, Joss and Ziaee, Farzaneh and Marchenko, Tatiana and Rolles, Daniel and Boll, Rebecca}},
  issn         = {{0953-4075}},
  keywords     = {{charge transfer; free-electron lasers; ultrafast molecular dynamics}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{1}},
  publisher    = {{IOP Publishing}},
  series       = {{Journal of Physics B: Atomic, Molecular and Optical Physics}},
  title        = {{UV-induced dissociation of CH<sub>2</sub>BrI probed by intense femtosecond XUV pulses}},
  url          = {{http://dx.doi.org/10.1088/1361-6455/ac489d}},
  doi          = {{10.1088/1361-6455/ac489d}},
  volume       = {{55}},
  year         = {{2022}},
}