University of Illinois Urbana-Champaign

The Vibrational Predissociation Of The à State Of The C3ar Van Der Waals Complex With Vibrational Energies Of 1558-1660 Cm−1

Hsu, Yen-Chu

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https://hdl.handle.net/2142/116937

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Title
The Vibrational Predissociation Of The à State Of The C3ar Van Der Waals Complex With Vibrational Energies Of 1558-1660 Cm−1
Author(s)
Hsu, Yen-Chu
Contributor(s)
Hsiao, Sheng-Chang
Issue Date
2022-06-22
Keyword(s)
Mini-symposium: Spectroscopy meets Chemical Dynamics
Abstract
The laser-induced fluorescence (LIF) and wavelength-resolved emission spectroscopic techniques have been used to study the rotational levels, the vibrational predissociation (VP) products and the product-state branching ratios of the \~{A} state of the C$_{3}$Ar van der Waals complex. The excited states were prepared by exciting the complex bands associated with 0 8$^{-}$ 0-000, 0 4$^{+}$ 0-000 and 0 0 2-000 bands of the \~{A} $^1$$\Pi$$_{u}$ - \~{X} $^1$$\Sigma$$_{g}$ system of C$_{3}$. The superscripts "-" and "+" denote the lower and upper Renner components, respectively. The type A and C bands of the complex bands are in pairs and they are separated by 2\nub{b} (b, van der Waals bending vibration).\footnote{A.J. Merer, Y.-C. Hsu, Y.-R. Chen, and Y.-J. Wang, J. Chem. Phys. 143, 194304(2015).} Of 11 bands, only two, associated with the 002-000 band of C$_{3}$, are rotationally resolved with a laser of 0.04 \wn resolution. The lifetimes of these complex bands are in the order of a few to a few tens of picoseconds estimated from the rotational linewidths of the LIF spectra. The VP processes are quite complex; more than one vibrational state of the C$_{3}$ fragments was identified from each upper complex level. The fragment states were the pure bending levels (0 v$_{2}$ 0) and the combination levels (1 v$_{2}$ 0) of the \~{A} state.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Handle URL
https://hdl.handle.net/2142/116937
DOI
https://doi.org/10.15278/isms.2022.WH05
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Copyright 2022 held by the authors

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Abstracts & Presentations - 2022 International Symposium on Molecular Spectroscopy PRIMARY