ROTATIONAL ANALYSIS OF THE $A^{3}\Pi(1)-X^{1}\Sigma^{+}$ SYSTEM OF IC1 IN EMISSION AND IN ABSORPTION
Loading...
Date
1978
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Detailed rotational analyses have been made of the $A^{3}\Pi(1) \leftrightarrow X^{1}\Sigma^{+}$ system of ICl, both in emission and absorption- The A $\rightarrow$ X emission system was excited by recombination of ground state $I(^{2}P_{3}/2)$ and $C1(^{2}P_{3}/2)$ atoms in a flow system at total pressures near 2 Torr. Ten bands with $0\leq v^{\prime}\leq 2$ and $6\leq v^{\prime\prime}\leq 9$ of $I^{35}C1$ were recorded photoelectrically in the range $\lambda 8000-9800 $ \AA, and were analysed to provide the first reliable rotational constants and terra values for these levels. The A $\leftarrow$ X system in absorption was photographed at high resolution using a 3.5 m Ebert spectrograph in the range$\lambda 7000-8000 $ \AA. Sixteen bands of $I^{35}C1$ with $3\leq v^{\prime}\leq 8$ and $2\leq v^{\prime\prime}\leq 5$ were analyzed. The present data and those obtained by refitting the precisely measured wavenumbers from the absorption spectrum at shorter $wavelengths^{1}$ were $merged^{2}$ to provide a self-consistent and extensive set of molecular constants for both the $A^{3}\Pi(1)$ and $X^{1}\Sigma^{+}$ states. The RKR turning points for these states and the Franck-Condon factors for the A - X system have been calculated.
Description
$^{1}$E. Hulthen et al. Arkiv Fysik, 14, 31 (1958); ibid 18, 479 (1960). $^{2}$D. L. Albritton, A. L, Schmeltekopf and R. N. Zare, J. Mol. Spectrosc. 67, 132 (1977).""
Author Institution: Department of Chemistry, Dalhousie University
Author Institution: Department of Chemistry, Dalhousie University