DIFFUSE AND INTERFERENCE BANDS IN ALKALI METAL DIMERS
Loading...
Date
1984
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
With the use of ultraviolet and violet single longitudinal mode laser lines from krypton and argon ion lasers, we have obtained diffuse fluorescence spectra of $Na_{2} (410-460 nm)$ and of $K_{2} (520-580 nm)$ which clearly show overlapping interference and diffuse structure (work on $Li_{2} (\sim 440-465 nm)$ is in progress and will also be reported). Analysis of the $Na_{2}$ spectra indicate that the transitions $$\begin{array}{cc}2^{1}\Sigma_{u}^{+}(double\, minimum)\to X^{1}\Sigma_{g}^{+}\\ and \, 2^{3}\Pi_{g}\to a^{3}\Sigma_{u}^{+}\end{array}$$ occur in the same spectral region. This overlapping was previously $predicted^{1}$ to occur in the case of $Li_{2}$. This interpretation is further supported by direct excitation studies of these bands which will also be reported. It might be noted that similar continua have been observed and assigned in $Rb_{2}$ and $Cs_{2}$. In the former $case^{2}$, there is only slight overlap while in the latter $case^{3}$, they are well separated.
Description
$^{1}$ G. Pichler, S. Milo\v{s}evi\'{c}, D. Ve\v{z}a and D.D. Konowalow, Chem. Phys. Letters 103, 352 (1984). $^{2}$ G. Pichler, S. Milo\v{s}evi\'{c}, D. Ve\v{z}a and D. Vuki\v{c}evi\'{c}, J. Phys. B 16, 4633 (1983). $^{3}$ J. Tellinghuisen, G. Pichler, W.L. Snow, M.E. Hillard and R.J. Exton, Chem. Phys. 50, 313 (1980).
Author Institution: Iowa Laser Facility and Department of Chemistry, University of Iowa; Institute of Physics, University of Zagreb; Bethel College, University of Zagreb
Author Institution: Iowa Laser Facility and Department of Chemistry, University of Iowa; Institute of Physics, University of Zagreb; Bethel College, University of Zagreb