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PreprintarXiv licencearXiv

Rotational-state-controlled dissociative ionization dynamics in CF2I2

  • Nidin Vadassery
  • Ivo S. Vinklárek
  • Sebastian Trippel
  • Jochen Küpper
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Abstract

We investigated strong-field dissociative ionization of CF2I2 ensembles prepared in different initial rotational-state distributions using an electrostatic deflector. Pronounced changes in ion-channel branching ratios revealed a strong dependence of the fragmentation dynamics on the initial rotational excitation. Analysis of fragment yields and their laser-power dependences identifies resonance-enhanced multiphoton ionization through an intermediate excited state, CF2I2∗. The measured branching behavior indicates competition between stabilization into bound ionic states and dissociative channels, driven by near-threshold non-adiabatic Coriolis-type coupling. Tuning the rotational energy by only a few μeV is sufficient to significantly alter the ionization dynamics and to redistribute the reaction products. These findings demonstrate the key role of rotational excitation in controlling non-adiabatic dynamics following strong-field ionization of CF2I2.

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Cite

BibTeXRIS
BibTeX
@misc{vadassery2026rotationalstatecontrolled,
  title = {{Rotational-state-controlled dissociative ionization dynamics in $\mathrmCF_2I_2$}},
  author = {Nidin Vadassery and Ivo S. Vinklárek and Sebastian Trippel and Jochen Küpper},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2608.04715},
  eprint = {2608.04715},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.04715},
}
RIS
TY  - UNPB
TI  - Rotational-state-controlled dissociative ionization dynamics in CF_2I_2
AU  - Nidin Vadassery
AU  - Ivo S. Vinklárek
AU  - Sebastian Trippel
AU  - Jochen Küpper
PY  - 2026
DA  - 2026/10/26
PB  - arXiv
DO  - 10.48550/arxiv.2608.04715
UR  - https://arxiv.org/abs/2608.04715
AB  - We investigated strong-field dissociative ionization of CF_2I_2 ensembles prepared in different initial rotational-state distributions using an electrostatic deflector. Pronounced changes in ion-channel branching ratios revealed a strong dependence of the fragmentation dynamics on the initial rotational excitation. Analysis of fragment yields and their laser-power dependences identifies resonance-enhanced multiphoton ionization through an intermediate excited state, CF_2I_2^∗. The measured branching behavior indicates competition between stabilization into bound ionic states and dissociative channels, driven by near-threshold non-adiabatic Coriolis-type coupling. Tuning the rotational energy by only a few μeV is sufficient to significantly alter the ionization dynamics and to redistribute the reaction products. These findings demonstrate the key role of rotational excitation in controlling non-adiabatic dynamics following strong-field ionization of CF_2I_2.
ER  -