University of Illinois Urbana-Champaign

Observing Chemical Reactions In Low-temperature Supersonic Flows Using Chirped Pulse Fourier Transform Millimeter Wave Spectroscopy

Gupta, Divita

Content Files
5059.pdf
WC05_5059.pdf

Permalink

https://hdl.handle.net/2142/111062

Description

Title
Observing Chemical Reactions In Low-temperature Supersonic Flows Using Chirped Pulse Fourier Transform Millimeter Wave Spectroscopy
Author(s)
Gupta, Divita
Contributor(s)
  • Sims, Ian R.
  • Drissi, Myriam
  • Hearne, Thomas Sandow
  • Abdelkader Khedaoui, Omar
  • Cooke, Ilsa Rose
  • Hays, Brian M
  • Guillaume, Theo
Issue Date
2021-06-23
Keyword(s)
Dynamics and kinetics
Date of Ingest
  • 2021-09-24T21:08:54Z
  • 2022-01-21T16:10:44Z
Abstract
The CPUF (Chirped Pulse in Uniform Flow) technique has been used previously in pulsed CRESU (Reaction Kinetics in Uniform Supersonic Flow) conditions to observe chemical reactions at low temperatures. We have adapted the technique to the continuous CRESU flows available in Rennes, and have observed the products of photolysis and chemical reactions using a chirped pulse Fourier transform millimeter wave spectrometer. We have characterized the flow conditions suitable for observing products of reactions and provide limits to the performance of these systems. In particular, pressure broadening is found to dominate these measurements, so steps had to be taken to resolve as much of the free induction decays as possible. We also observe the products of chemical reactions, particularly of CN radicals with hydrocarbons. The behavior of these products in CRESU environments as well as the results from these studies will be given and the application to observing the branching ratios of chemical reactions will be discussed.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
Text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/111062
DOI
10.15278/isms.2021.WC05

Owning Collections

Abstracts & Presentations - 2021 International Symposium on Molecular Spectroscopy PRIMARY