COLLISION INDUCED SPECTRA OF OXYGEN
Loading...
Date
1968
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
A 3.8 meter cell which operates routinely at variable path lengths up to 230 meters and which may be cooled to $77^{\circ}K$ will be $described.^{1}$ The collision induced spectra are examined in several regions at a pressure of about 1 atmosphere and temperatures from $77-300^{\circ}K$. The $^{1}\Delta_{g}\leftarrow ^{3}\Sigma^{-}_{g}$ system $(1.2 \mu)$ consists of sharp features due to rotational fine structure of monomer $O_{2}$ and a broad underlying continuum attributed to the collision induced spectra of oxygen dimers. Simultaneous transitions are observed at $0.6 \mu$ in which a collision complex of two oxygens simultaneously undergo a $^{1}\Delta_{g}\leftarrow ^{3}\Sigma^{-}_{g}$ transition. The absorptions of collision induced transitions increase dramatically at temperatures near $\epsilon/k \sim 100^{\circ}K$ for oxygen. This occurs when the kinetic energy approaches the intermolecular potential energy and oxygen begins to cluster in the gas phase.
Description
$^{1}$ R.P. Blickensderfer, R. Leonard and G.E. Ewing, Applied Optics 1968, in press.
Author Institution: Department of Chemistry, Indiana University
Author Institution: Department of Chemistry, Indiana University