期刊
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
卷 55, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6455/ac489d
关键词
free-electron lasers; charge transfer; ultrafast molecular dynamics
资金
- BMBF [05K10KT2, 05K13KT2, 05K16KT3, 05K10KTB, FSP-302]
- Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy [DE-FG02-86ER13491, DE-SC0019451]
- French Agence Nationale de la Recherche (ANR) through the ATTOMEMUCHO Project [ANR-16-CE30-0001]
- German-Russian Interdisciplinary Science Center - German Federal Foreign Office via the German Academic Exchange Service (DAAD) [C-2015a-6, C-2015b-6, C-2016b-7]
- Saint-Petersburg State University
- CNRS PEPS SASLELX program
- Agence Nationale pour la Recherche [ANR11-EQPX0005-ATTOLAB, ANR14-CE320010-Xstase]
- EPSRC [EP/L005913/1, EP/T021675/1, EP/V026690/1, EP/S028617/1]
- Swedish Research Council
- Swedish Foundation for Strategic Research
- Deutsches Elektronen-Synchrotron DESY
- Deutsche Forschungsgemeinschaft through the Cluster of Excellence 'Center for Ultrafast Imaging' (CUI) [EXC 1074, 194651731]
- Deutsche Forschungsgemeinschaft through the Cluster of Excellence 'Advanced Imaging of Matter' (AIM) [EXC 2056, 390715994]
- Initiative and Networking Fund of the Helmholtz Association through the Young Investigators Group program [VH-NG-1104]
- Helmholtz Association (HGF)
The ultraviolet-induced dissociation and photofragmentation of gas-phase CH2BrI molecules, induced by intense femtosecond extreme ultraviolet pulses at different photon energies, are studied. The charge transfer between highly charged iodine ions and neutral CH2Br radicals produced by C-I bond cleavage is investigated. The rotation of the fragment induced by the bond cleavage is found to have an influence on the charge transfer process.
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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