Files in this item

FilesDescriptionFormat

application/pdf

application/pdf1266884.pdf (16MB)
PresentationPDF

application/pdf

application/pdf3452.pdf (75kB)
AbstractPDF

Description

Title:DECOMPOSITION OF VIBRONIC AND RENNER-TELLER STRUCTURE IN C2H AND C2D FROM ANION HIGH-RESOLUTION PHOTOELECTRON IMAGING
Author(s):Gibson, Stephen T.
Contributor(s):Laws, Benjamin A.
Subject(s):Radicals
Abstract:\begin{wrapfigure}{r}{0pt} \includegraphics[scale=0.5,clip]{C2DvsC2H-PES.eps} \end{wrapfigure} The ethynyl radial, C$_2$H, has a complex spectral structure due to vibronic coupling between the ground $\tilde{X}\,^2\Sigma^+$ and low-lying $\tilde{A}\,^2\Pi$ electronic states, and a Renner-Teller interaction within the $\Pi$ state. A good understanding of the low-lying rovibrational structure has come from measurements, including slow electron velocity-map imaging of anion photoelectron spectra\footnote{J. Zhou \emph{et al.} \emph{J. Chem. Phys.} \textbf{127}, 114313 (2007).}, and \emph{ab initio} calculations\footnote{R. Tarroni and S. Carter, \emph{J. Chem. Phys.} \textbf{119}, 12878 (2003).}, that give wavefunction character. In this work, high-resolution photoelectron velocity-map imaging of C$_2$H$^-$ and C$_2$D$^-$ photodetachment (the 355~nm wavelength illustrated), provide a quantitative comparison over an extended energy range, to reveal unassigned structure, anomalous intensities, and illustrate the dramatic difference between isotopologues in the region of the $A$-state. These measurements, together with the measured photoelectron angular distributions, provide new insight into the non-adiabatic couplings of ethynyl. \makeatletter{\renewcommand*{\@makefnmark}{}\footnotetext{Research supported by the Australian Research Council Discovery Project Grant DP160102585.}\makeatother}
Issue Date:06/18/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100782
DOI:10.15278/isms.2018.MJ06
Other Identifier(s):MJ06
Date Available in IDEALS:2018-08-17
2018-12-12


This item appears in the following Collection(s)

Item Statistics