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Title:VIBRATIONAL PREDISSOCIATION OF THE Ã 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
Subject(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.
Issue Date:6/23/2017
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/97195
DOI:10.15278/isms.2017.FD02
Date Available in IDEALS:2017-07-27


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