Knowledge Bank

We will report on new laser induced fluorescence (LIF) measurements of the $A1A\prime \prime -X1A\prime$ system in the monohalocarbenes HCCl and HCF, and the $A1B1-X1A1$ system in the dihalocarbene $CCl2$. The carbenes were generated under jet-cooled conditions using a pulsed discharge source. We have applied a variety of techniques to examine the excited state properties, and results from fluorescence excitation spectroscopy, single vibronic level lifetime measurements, and quantum beat spectroscopy will be reported.