Cited by 47Molecular Spectroscopy and StructureSpectroscopy and Quantum Chemical StudiesSpectroscopy and Laser Applications

Degenerate four-wave mixing and photofragment yield spectroscopic study of jet-cooled SO2 in the C̃ 1B2 state: Internal conversion followed by dissociation in the X̃ state

Okazaki, Akihiro, Ebata, Takayuki, Mikami, Naohiko·1997·The Journal of Chemical Physics

Abstract

The predissociation mechanism of the C̃ state of SO2 have been investigated by the measurements of degenerate four-wave mixing (DFWM), laser-induced fluorescence (LIF) and photofragment yield spectra. The DFWM spectrum of jet-cooled SO2 was measured under a high power condition where the DFWM signal corresponds well to the absorption spectrum. Relative fluorescence quantum yields of various vibronic bands were obtained by comparing the DFWM spectrum with the LIF spectrum. It was found that the fluorescence quantum yields of the vibronic levels involving anti-symmetric stretching (ν3) vibration are considerably smaller than those of other levels. The result indicates that the nonradiative process of the C̃ state is initiated as the internal conversion to the X̃ state and ν3 acts as the promoting mode. By observing the O atom photofragment yield spectrum we confirmed that the predissociation occurs from the (1,4,2) level. Vibronic dependence of the rise time of the O atom generation was found to be in accordance with those of the fluorescence decay rate. The obtained results represent that the dissociation occurs immediately after the internal conversion to the X̃ state.

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Crossref · 10.1063/1.475168

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  • FWM with optical lasers is an important technique that can be used in fields as diverse as combustion science and molecular spectroscopy.

    “FWM with optical lasers is an important technique, which can be used in fields as diverse as combustion science [70] and molecular spectroscopy [71].”

    From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [71]

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Authors
Okazaki, A., Ebata, T., & Mikami, N.
Affiliations
Tohoku University (JP)
Venue
The Journal of Chemical Physics
Published
1997-12-01
Volume
107
Issue
21
Pages
8752-8758
ISSN
  • 0021-9606 (ISSN-L)
  • 1089-7690
OpenAlex
W2071073780
Cited by
47
References
33
Citations by year
2026: 1 · 2024: 1 · 2023: 3 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 3 · 2017: 5 · 2016: 2 · 2015: 2 · 2013: 1
FWCI
2.26
Type
journal article
Language
en
Open access
closed
Locations
The Journal of Chemical Physics (publishedVersion)
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Molecular Spectroscopy and Structure
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Spectroscopy and Quantum Chemical Studies
  • Physical Sciences › Chemistry › Spectroscopy › Spectroscopy and Laser Applications
Keywords
sulfur dioxide, predissociation, internal conversion, photodissociation, degenerate four-wave mixing, jet-cooled molecules, fluorescence quantum yield, vibronic levels, nonradiative decay, laser-induced fluorescence

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