Acetylene intensity measurements using a tunable laser spectrometer

Author

Jean-Luc Salanave

Date of Award

6-1987

Degree Type

Thesis

Degree Name

Master of Science

Major

Physics

Major Professor

William E. Blass

Committee Members

Stephen T. Downs, Robert J. Lovell

Abstract

High resolution knowledge of acetylene spectral features is a prerequisite for quantitative analyses in planetary atmospheres of Titan, Saturn, and Jupiter. Line and band intensity measurements on ¹²C₂H₂ and ¹²C¹³CH₂ around 13.7 micrometers were performed with spectral resolution of 0.0005 cm^-1, using a tunable diode laser spectrometer. Band intensities extracted from line intensity measurements, in units of cm^-2atm^-1 at 296 K, are: 565 for the v₅-fundamental band of ¹²C₂H₂, 24.6 for the (v₄+v₅)^-o-v₄¹ band of ¹²C₂H₂, and 581 for the v₅-fundamental band of ¹²C¹³CH₂.

Due to the sensitivity of the technique, pressure self-broadening of the order of 0.15 cm ¹ per atm. for the half-width (0.0002 cm¹ per torr), and pressure shift of the order of -0.003¹ at 1 torr were also observed. These latter results have to be confirmed by further measurements.

Recommended Citation

Salanave, Jean-Luc, "Acetylene intensity measurements using a tunable laser spectrometer. " Master's Thesis, University of Tennessee, 1987.
https://trace.tennessee.edu/utk_gradthes/13578