SEPARATION AND CONVERSION OF NUCLEAR SPIN ISOMERS OF ETHYLENE
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Date
2005
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The separation and conversion of nuclear spin isomers with ${A_g}$, ${B_{1g}}$, ${B_{2u}}$, and ${B_{3u}}$ symmetry of normal ethylene (C$_2$H$_4$) have been investigated by a newly assembled experimental setup in the first case studied so far for a planar, asymmetric-top polyatomic molecule that has four nuclear spin isomers with the ${D_{2h}}$ symmetry group. One of the nuclear spin isomers of C$_2$H$_4$ is first separated using the 10$P$44 CO$_2$ laser line in the method of Light-Induced Drift}}, 711 (1979).}. The equilibration decay curves of the spin isomers are then measured using a second probe CO$_2$ laser to monitor absorption spectral line intensities as a function of time. The conversion rates between isomers have been determined by fitting these decay curves to an exponential function. The experimental results and their interpretations will be presented.
Description
{F.Kh. Gelmukhanov, and A.M. shalagin, JETP Lett. {\bf{29
Author Institution: Department of Physics, Toyama University, 930-8555, Japan; Department of Physics, Yantai University, 264005, P. R. China; Department of Physics, Toyama University, 930-8555, Japan
Author Institution: Department of Physics, Toyama University, 930-8555, Japan; Department of Physics, Yantai University, 264005, P. R. China; Department of Physics, Toyama University, 930-8555, Japan