Tracking the nuclear movement of the carbonyl sulfide cation after strong-field ionization by time-resolved Coulomb-explosion imaging

Zhao, Xiaoyan; Xu, Ting; Yu, Xitao; Ren, Dianxiang; Zhang, Xinyu; Li, Xiaokai; Ma, Pan; Wang, Chuncheng; Zhang, Dongdong; Wang, Qinxin; Hu, Xiaoqing; Luo, Sizuo; Wu, Yong; Wang, Jianguo; Ding, Dajun

doi:10.1103/physreva.103.053103

Cited by 17 publications

(15 citation statements)

References 40 publications

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“…We start the discussion with the major dissociation channel, OCS 2+ → OC + + S + , compare it to previous studies of OCS in intense laser fields (Holmegaard et al, 2010;Dimitrovski et al, 2011;Ohmura et al, 2014Ohmura et al, , 2019Ma et al, 2019;Zhao et al, 2021), and discuss its dissociation mechanisms. Next, we focus on the minor dissociation channel, OCS 2+ → O + + CS + .…”

Section: Resultsmentioning

confidence: 99%

“…In the present study, we investigated the break-up processes of carbonyl sulfide, OCS, in phase-locked two-color intense laser fields by using the Coulomb explosion imaging technique (Wales et al, 2014;Endo et al, 2020;Zhao et al, 2021). OCS is the prototype of a heavy polar molecule (not containing hydrogen atoms) and has been widely investigated, including a molecular movie of its alignment (Karamatskos et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Post-Ionization Dynamics of the Polar Molecule OCS in Asymmetric Laser Fields

et al. 2022

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We have investigated the dissociation mechanisms of the prototypical heavy polar molecule OCS into the two break-up channels of the dication, OCS2+ → O+ + CS+ and OC+ + S+, in phase-locked two-color intense laser fields. The branching ratio of the breaking of the C–O and C–S bonds followed a pronounced 2π-oscillation with a modulation depth of 11%, depending on the relative phase of the two-color laser fields. The fragment ejection direction of both break-up channels reflects the anisotropy of the tunneling ionization rate, following a 2π-periodicity, as well. The two dissociation pathways in the C–S bond breaking channel show different phase dependencies of the fragment ejection direction, which are assigned to post-ionization dynamics. These observations, resulting from the excitation with asymmetric two-color intense laser fields, supported by state-of-the-art theoretical simulations, reveal the importance of post-ionization population dynamics in addition to tunneling ionization in the molecular fragmentation processes, even for heavy polar molecules.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Post-Ionization Dynamics of the Polar Molecule OCS in Asymmetric Laser Fields

et al. 2022

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“…The pump and probe beams are built in a Mach-Zehnder interferometer, in which time zero is determined by measuring the time-dependent N 2 O + signal, and the full-width-half-maximum (FWHM) of the cross-correlation profile is 90 fs from a Gaussian fitting. More details of the experimental setup can be found in our previous publications [34,44,45].…”

Section: Methodsmentioning

confidence: 99%

Probing electron localization during molecular dissociation by femtosecond strong-field ion momentum spectroscopy

Luo¹,

Zhao

et al. 2022

Preprint

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The study of the dynamics of molecular valence electrons and their coupling with nucleus motion is a frontier in ultrafast physics and ultrafast chemistry. Here, we investigate the behavior of valence electrons and nucleus wavepackets on a femtosecond time scale by the time-resolved strong-field ion momentum spectroscopy. Two orientation-dependent bond-breakages of N2O molecules from the same electronic state are studied, and the evolution of dipole moment during molecular breaking on the asymmetric Pzsum distribution is analyzed, and thus the electron localization during the molecules dissociating into ions and atoms is captured. The overall agreement between experimental and theoretical results for the orientation-dependent dissociation dynamics promotes the understanding of the evolution of nucleus wavepackets and provides a basis for the control of molecular ultrafast chemical reactions.

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“…For example, in the two-body breakups of molecular dimers, it is found that the molecular fragments can rotate rapidly under the influence of neighbor ion [229,232] and such an ultrafast rotation mechanism is revealed to be a general phenomenon in the breakups of polyatomic molecule, which are dominated by the polycentric interaction between fragments and impacted by the vibrationrotation and rotation-rotation couplings. These methods were also extended to study the pump-probe experiments, for examples, the real-time bond-breaking dynamics of OCS + caused by radial coupling interaction [233] and the photon-induced ultrafast processes of the SO 2 . [234]…”

Section: Energy Transfermentioning

confidence: 99%

Atomic structure and collision dynamics with highly charged ions

Ma¹,

Zhang²,

Wen³

et al. 2022

Chinese Phys. B

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The research progresses on the investigations of atomic structure and collision dynamics with highly charged ions based on the heavy ion storage rings and electron ion beam traps in recent 20 years are reviewed. The structure part covers test of quantum electrodynamics and electron correlation in strong Coulomb field studied through dielectronic recombination spectroscopy and VUV/x-ray spectroscopy. The collision dynamics part includes charge exchange dynamics in ion-atom collisions mainly in Bohr velocity region, ion induced fragmentation mechanisms of molecules, hydrogen-bound and van de Waals bound clusters, interference and phase information observed in ion-atom/molecule collisions. With this achievements, two aspects of theoretical studies related to low energy and relativistic energy collisions are presented. The applications of data relevant to key atomic processes like dielectronic recombination and charge exchanges involving highly charged ions are discussed. At end of this review, some future prospects of research related to highly charged ions are proposed.

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Tracking the nuclear movement of the carbonyl sulfide cation after strong-field ionization by time-resolved Coulomb-explosion imaging

Cited by 17 publications

References 40 publications

Post-Ionization Dynamics of the Polar Molecule OCS in Asymmetric Laser Fields

Post-Ionization Dynamics of the Polar Molecule OCS in Asymmetric Laser Fields

Probing electron localization during molecular dissociation by femtosecond strong-field ion momentum spectroscopy

Atomic structure and collision dynamics with highly charged ions

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