Knowledge Bank

Diode laser heterodyne techniques have been used to study the extreme P-branch of the $\nu 1$ band of $\mathrm{<mrow\; data-mjx-texclass="ORD">32</mrow>}S16O2$. Fifty-five high J, K absorption lines have been measured with an accuracy of $\pm 6MHz$. These data were combined with previously measured ground state and excited state microwave data to obtain an improved set of molecular constants for the $\nu 1$ state. The value obtained for the band center, $\nu 0$ was $1151.71352(31)cm-1$. Sub-millimeter laser transitions have recently been observed when the $\nu 1$ band is pumped with a $CO2$ $laser1,2$. The constants obtained have been used to assign these high quantum number transitions.