ROTATIONALLY RESOLVED ABSORPTION IN $Hg_{2} (O_{g}^{+} - 1_{u})$
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Date
1979
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Ohio State University
Abstract
Structured absorption has been observed while probing a $^{199}$ Hg cell with a single frequency laser. The probe beam is sum-frequency generated using the technique of Blit $et al^{1}$, but with the parent $Ar^{+}$ and dye lasers operated single mode. The beam passes twice through a 50cm cell. Atomic absorption at the $^{1}{S_{o}} - ^{3}P_{o}$ forbidden transition ($\sigma \simeq1.2 \times 10^{-20} cm^{2}$) is observed as well as many rotational lines of the $O^{+}_{g} - 1_{u}$ system. These lines, occurring with ca. 4 GHz spacing, are believed to be the first observation of resolved rotational structure in $Hg_{2}$. Measurements have also been obtained with a $^{200}$Hg cell and with a high power Xe are lamp source. Possible interpretation of the observed spectra will be discussed.
Description
$^{1}$S. Blit, E. G. Weaver, F. B. Dunning, and F. K. Tittel, Optics Lett, 1, 58, (1977).
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