Knowledge Bank

We present the rotationally resolved, laser-induced fluorescence spectra of jet-cooled $ZnCH3$ and $CdCH3$. The preliminary analysis of the origin band for both spin-orbit components of the $A¯2E\leftarrow X¯2A1$ electronic transition for $ZnCH3$ was reported at the 47th $Symposium.1$ Since that report, a final fit has been performed. Additionally, a spectrum for the $CdCH3A¯2E1/2\leftarrow 2E3/2\leftarrow X¯2A1$ transition has been recorded and globally fit with the previously reported $A¯2E1/2\leftarrow X¯2A1$ transition. The $A¯2E3/2$ state of $CdCH3$ exhibits a reduced lifetime, correspondingly broader linewidths and reduced intensity pointing to the existence of a nearby non-radiative perturbing state postulated in earlier $work.2$ This non-radiative state is thought to be responsible for significant Jahn-Teller-like interactions that alter the spectrum of the $A¯2E3/2\leftarrow X¯2A1CdCH3$ transition compared to the other bands reported here. Results of the fit will be discussed for both species.