University of Illinois Urbana-Champaign

Time-resolved measurement of the C2 1Aπu state population following photodissociation of the S1 state of acetylene using frequency-modulation spectroscopy

Du, Zhenhui

Content Files
2622.pdf
962274.pptx
ISMS-2017_Zhenhui.pdf

Permalink

https://hdl.handle.net/2142/96990

Description

Title
Time-resolved measurement of the C2 1Aπu state population following photodissociation of the S1 state of acetylene using frequency-modulation spectroscopy
Author(s)
Du, Zhenhui
Contributor(s)
  • Field, Robert W.
  • Jiang, Jun
Issue Date
2017-06-20
Keyword(s)
Multiple potential energy surfaces
Date of Ingest
  • 2017-07-27T20:15:28Z
  • 2018-01-29T23:02:10Z
Abstract
The excited-state population of the C$_2$ $^1APi_u$ state produced in photolysis of S$_1$ acetylene was investigated. The pulsed UV laser (216.5 nm) excites acetylene into $J=8$ $e$-symmetry level of the S$_1$ $3^4$ level, and subsequently dissociates the S$_1$ acetylene into C$_2$ fragments. A frequency-modulated near-infrared probe laser beam is used to detect the C$_2$ population in the $^1APi_u$ state. The sensitivity and the fast response of the experimental setup has been verified by I$_2$ excited state measurements. The setup will be used to record the C$_2$ $A-X$ transitions, which are fitted with a Voigt function. The derived lineshape and line intensities will be analyzed, and we will use the information to calculate the $A$ state populations of C$_2$ and map the populations with time-resolution following the photolysis.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/96990
DOI
https://doi.org/10.15278/isms.2017.TB02
Copyright and License Information
Copyright 2017 Zhenhui Du

Owning Collections

Abstracts & Presentations - 2017 International Symposium on Molecular Spectroscopy PRIMARY