EVIDENCE FOR THE PREPARATION OF A NON-STATIONARY STATE OF $NO_{2}$ FROM OPTICAL RADIO FREQUENCY DOUBLE RESONANCE SPECTRA
Loading...
Date
1979
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
In addition to the narrow resonances from the hyperfine components of the particular rotational line of the $NO_{2}\ ^{2}B_{2}$ state excited, a broad resonance appears in the ORDER $spectrum.^{1}$ This resonance has a pressure independent lifetime of $0.4 \pm 0.1$ us which is attributed to the ``lifetime’’ of a non-stationary state prepared by the excitation source. This lifetime corresponds to the lifetime $\tau_{o}$ introduced in a simple model of the dephasing and radiative lifetimes of $NO_{2}.^{2}$ According to this model the dephasing lifetime, $\tau_{c}$, depends on $\tau_{o}$ and the rotational quantum number N as follows: \begin{equation} \tau_{c} = \tau_{o} (2N + 1) \end{equation} Dephasing times measured in the Hanle effect are well predicted by this $model.^{3}$
Description
$^{1}$ H. G, Weber, P. J. Brucat, and R. N. Zare, Chem. Phys. Lett. (accepted for publication). $^{2}$ H. G. Weber, P. J. Brucat, and R. N. Zare. Chem. Phys. Lett. 60, 179 (1979). $^{3}$ H. Figger, D. L. Monts, and R. N. Zare, J. Mol. Spec. 68, 388 (1977). We gratefully acknowledge support for this research from the National Science Foundation.
Author Institution:
Author Institution: