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

Journal Article · · Journal of Physics. B, Atomic, Molecular and Optical Physics
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  1. University of Oxford (United Kingdom); OSTI
  2. University of Oxford (United Kingdom); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  3. University of Oxford (United Kingdom)
  4. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  5. Max-Born-Institut, Berlin (Germany)
  6. Sorbonne Université, Paris (France)
  7. Lund University (Sweden)
  8. Université Paris-Saclay, Gif-Sur-Yvette (France)
  9. Max-Born-Institut, Berlin (Germany); Sorbonne Université, Paris (France)
  10. Daresbury Laboratory, Cheshire (United Kingdom)
  11. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Universität Hamburg (Germany)
  12. Gothenburg University (Sweden); Lund University (Sweden)
  13. Saint-Petersburg State University (Russia)
  14. European XFEL, Schenefeld (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  15. Sorbonne Université, Paris (France); Uppsala University (Sweden)
  16. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); European XFEL, Schenefeld (Germany)
  17. Kansas State University, Manhattan, KS (United States)
+ Show Author Affiliations
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.
Research Organization:
Kansas State University, Manhattan, KS (United States)
Sponsoring Organization:
Agence Nationale pour la Recherche; BMBF; EPSRC Programme Grants; German-Russian Interdisciplinary Science Center; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
Grant/Contract Number:
FG02-86ER13491; SC0019451
OSTI ID:
1979258
Journal Information:
Journal of Physics. B, Atomic, Molecular and Optical Physics, Journal Name: Journal of Physics. B, Atomic, Molecular and Optical Physics Journal Issue: 1 Vol. 55; ISSN 0953-4075
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
Optics
Physics
charge transfer
free-electron lasers
ultrafast molecular dynamics