SELF- AND AIR-BROADENED LINEWIDTHS OF FORMAL--DEHYDE
Loading...
Date
1977
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Self-broadened and foreign-gas ($N_{2}$ and $O_{2}$) broadened linewidths of $H_{2}CO$ at $300^\circ K$ for a wide range of quantum numbers J and $K_{a}$, for all three types of bands, have been calculated using the Anderson-Tsao-Curnutte theory of line broadening. Due to the large dipole moment of formaldehyde, quadrupolar interaction were found to contribute negligibly to the line-width. Because of this, in the case of $H_{2}CO-H_{2}CO$ collisions, only dipole-dipole interaction has been included For $H_{2}CO-N_{2}$ and $H_{2}CO-O_{2}$ collisions, dipole-quadrupole interaction was taken Into account. Computed values for self- and $N_{2}$-broadened linewidths are in good agreement with the measured values reported in the literature. Air-broadened linewidths of $H_{2}CO$ have also been calculated at $200^\circ K$ so that the temperature dependence can be estimated.
Description
Author Institution: Ames Laboratory-ERDA and Department of Chemistry, Iowa State University