AUTODETACHMENT AND VIBRONIC COUPLED PHOTODETACHMENT TRANSITIONS OF C2H3O−

Gibson, Stephen T

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https://hdl.handle.net/2142/104507 Copy

Description

Title

AUTODETACHMENT AND VIBRONIC COUPLED PHOTODETACHMENT TRANSITIONS OF C2H3O−

Author(s)

Gibson, Stephen T

Contributor(s)

Laws, Benjamin A

Issue Date

2019-06-19

Keyword(s)

Ions

Abstract

\begin{wrapfigure}{r}{0pt} \includegraphics[scale=0.7, clip]{C2H3O-PESvsMiller.eps} \end{wrapfigure} The photoelectron spectrum of the vinoxy anion C$_2$H$_3$O$^-$ is studied using velocity-imaging, with the angular distributions providing electronic-state and vibrational-mode specific characterization. A 355~nm photoelectron spectrum, together with anisotropy parameters determined for some of the stronger transitions is show in the figure. Photodetachment at longer wavelengths have also been measured. The spectroscopic analysis builds on a previous SEVI\footnote{Slow-Electron-Velocity-map-Imaging: Yacovitch \emph{et al.} J Chem Phys \textbf{130} 244309 (2009) doi:10.1063/1.3157208} study, and a CRDS\footnote{Cavity-Ring-Down-Spectroscopy: Thomas \emph{et al.} J Chem Phys \textbf{132} 114302 (2010) doi:10.1063/1.3352976} work. Forbidden asymmetric vibrational modes may gain intensity through vibronic coupling between the neutral ground state and an excited state, of the correct symmetry, and have an anomalous anisotropy parameter. The positive $\tilde{X}$ transition is $9^2_0 11^1_1$. In addition, the vinoxy anion has dipole-bound excited electronic states, that produce very narrow transitions. For C$_2$H$_3$O$^-$ there is evidence of autodetachment from dipole-bound states of the anion, and vibronic coupling of the neutral ground state. \makeatletter{\renewcommand*{\@makefnmark}{}\footnotetext{Research supported by the Australian Research Council Discovery Project Grant DP160102585.}\makeatother}

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/104507

DOI

10.15278/isms.2019.WF07

Copyright and License Information

Copyright 2019 Stephen T Gibson

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