STIMULATED EMISSION POLARIZATION SPECTROSCOPY
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Date
1988
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Publisher
Ohio State University
Abstract
A polarization detection method was demonstrated for Stimulated Emission Spectroscopy (SES) in the study of the vibration-rotation levels of X, Ag glyoxal. The polarization methods allowed detection of a stimulated emission signal as small as $10^{-1}$ of the stimulating laser intensity, while the laser pulses had 10\% fluctuation in intensity. Analysis of the intensity and the polarization of the stimulating photons unambiguously showed that the observed spectral lines resulted from a stimulated emission process. The vibrational term value of the $v_{2}= 2 CO$ stretch level was measured to be $3473.2=0.2 cm^{-1}$ and the vibrational constants for the $\nu_{2}$ mode were determined as $\omega= 1745.8(5) cm^{-1}$ and $X_{22} = -4.6(5) cm^{-1}$. It was observed that the $K^{2+}$) rotational levels are perturbed by an a-axis Coriolis coupling. Only the B and C rotational constants are accurately determined as 0.1584(8) and $0.1500(10) cm^{-1}$.
Description
Author Institution: Chemistry Department, University of Pennsylvania Philadelphis