MICROWAVE DOUBLE RESONANCE COLLISIONAL SPECTRA FOR OCS $J = 2\leftarrow 1$ FOUR-LEVEL SYSTEMS

Loading...
Thumbnail Image

Date

1979

Journal Title

Journal ISSN

Volume Title

Publisher

Ohio State University

Research Projects

Organizational Units

Journal Issue

Abstract

Collisional transfer of rotational energy in OCS has been investigated by microwave double resonance for various M-resolved and zero-field four-level systems involving the $J = 2\leftarrow 1$ transition in the ground and first excited bending states. As reported $previously,^{1}$ the signs of the fractional signal intensity changes $\Delta I/I$ for the pure gas show that dipolar, parity-changing collisional transitions are preferred. For mixtures of OCS with excess $He, H_{2}$ and $D_{2}, \Delta I \simeq 0$ for the ground vibrational state, indicating no collisional preferences. For the $\ell$-doubled $v_{2}=1$ excited bending state, $\Delta I/I$ changes sign for the zero-field system in going from the pure gas to the $He, H_{2}$ and $D_{2}$ mixtures, revealing that parity-conserving $\Delta J = \pm 1$ transitions are preferred over the $\Delta J = 0$ intra-doublet parity-changing transitions.

Description

$^{1}$T. Oka, Adv. At. Mol. Phys. 9. 127 (1973)
Author Institution:

Keywords

Citation