A study of acetylene collision broadening by hydrogen and nitrogen using a tunable laser spectrometer

Author

Vincent Wan Loy Chin

Date of Award

7-1985

Degree Type

Thesis

Degree Name

Master of Science

Major

Physics

Major Professor

William E. Blass

Committee Members

A. H. Nielsen, R. J. Lovell

Abstract

Collision broadening of acetylene spectra by hydrogen and nitrogen was studied in the 14 μ m region using a diode laser spectrometer. A total of fifteen P(J) and Q(J) transitions in the υ₅ fundamental band were observed.

The reduced Lorentz-widths per unit pressure from the observed Voigt width were fitted to a model quadratic in the angular momentum, i.e., γ_L = γ_L⁰ + γ_C^(1)J + γ_C^(2)J2 results for the nitrogen broadened lines were 0.2260 milli-cm^-1/Torr for γ_L⁰, the collision broadened coefficient at J = 0, and γ_c⁽¹⁾ = -0.005005 and γ_c⁽²⁾ = 0.00013458 milli-cm^-1/Torr. The results for the hydrogen broadened lines were γ_C⁰ = 0.2169 milli-cm^-1/Torr, and γ_C⁽¹⁾ = -0.003937 and γ_c⁽²⁾ = 0.000114 milli-cm^-1/Torr.

Recommended Citation

Chin, Vincent Wan Loy, "A study of acetylene collision broadening by hydrogen and nitrogen using a tunable laser spectrometer. " Master's Thesis, University of Tennessee, 1985.
https://trace.tennessee.edu/utk_gradthes/13953