Vibrational predissociation of the à state of the C3Ar complex in the excitation energy region of 25410-25535 cm−1

Hsu, Yen-Chu

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https://hdl.handle.net/2142/97195 Copy

Description

Title

Vibrational predissociation of the à state of the C3Ar complex in the excitation energy region of 25410-25535 cm−1

Author(s)

Hsu, Yen-Chu

Contributor(s)

Wang, Yi-Jen

Issue Date

2017-06-23

Keyword(s)

Clusters/complexes

Abstract

About 11 C$_3$Ar bands near the 0 4$^-$ 0-000 and 0 2$^+$ 0-000 transitions of the ~{A}$^1$$Pi$$_u$$-$~{X}$^1$$Sigma$$^+$$_g$ system of C$_3$ have been studied by both laser-induced fluorescence and wavelength-resolved emission techniques. Two prominent pairs of C$_3$Ar features were observed to the red of each of these two C$_3$ transitions. Each pair consists of a type A band and a type C band, with the type C band lying about 3 cm$^{-1}$ above the type A band. Rotational analysis showed that three of the bands are comparatively sharp, with line widths of 0.035 cm$^{-1}$, but the pair at 25504 and 25507 cm$^{-1}$ shows clear evidence of diffuseness. The spectral widths of the rotational lines do not depend on the excitation energies in any simple way. Most of the features in the wavelength-resolved emission spectra can be assigned as emission from vibrationally excited levels of the ~{A} state of the C$_3$ fragments down to the ground electronic state. Two different types of vibrational excitation of the C$_3$ fragments have been found: pure C$_3$-bending and antisymmetric C-C stretching. The branching ratios of the C$_3$ product states, the C$_3$-Ar vdW binding energy, and propensity rules for vibrational predissociation processes will be presented.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/97195

DOI

https://doi.org/10.15278/isms.2017.FD02

Copyright and License Information

Copyright 2017 Yen-Chu Hsu

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