Knowledge Bank

Analysis of the Dispersed Fluorescence spectra of Acetylene Isotopomers ($\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}C2H2$, $\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}C2H2$, $\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}C2HD$) has continued to provide information about the structure and dynamics on both the $X~$ state and $A~$ state potential surfaces. Sampling of specific regions of the potential surfaces is a consequence of the different integer multiple ratios among the fundamental vibrational frequencies of the different isotopomers. Insights from these studies are summarized.