Knowledge Bank

The Fourier Transform spectra at isotopically enriched carbon disulfide have been obtained with a resolution of $0.01cm-1$ at the Kitt Peak National $Observatory.\ast$ The ($\nu 1+\nu 3$) combination binds in the region $2100-225Ocm-1$ of several isotopic species particularly $\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}C\mathrm{<mrow\; data-mjx-texclass="ORD">32</mrow>}S\mathrm{<mrow\; data-mjx-texclass="ORD">34</mrow>}S,\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}C\mathrm{<mrow\; data-mjx-texclass="ORD">32</mrow>}S\mathrm{<mrow\; data-mjx-texclass="ORD">33</mrow>}S,\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}C32S2$ and $\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}C\mathrm{<mrow\; data-mjx-texclass="ORD">32</mrow>}S2$ have been reinvestigated. Due to the better resolution in the present studies, closely spaced lines could be resolved. Leading to better determined molecular constants. Two new bend systems $0201+0000$ and $0311\leftarrow 0110$ of $\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}C32S34S$ have also been identified and analyzed. The $\ell$-type doubling in the $\Pi -\Pi$ band was found to be resolved for lines with $J>13$, and the l-type doubling constants for the $0l10$ and $0311$ states of $\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}2C32S34S$ have been obtained.