Knowledge Bank

The permanent electric dipole moment of CaOH and SrOH in their $X2\Sigma +$, $A2\Pi 3/2$, $A2\Pi 1/2$ and $B2\Sigma +$ states have been measured using the tecnique of supersonic molecular beam optical Stark spectroscopy. For CaOH the values obtained were $\mu (x2\Sigma +)=1.465(61)D,\mu (A2\Pi 1/2)=0.836(32)D,\mu (A2\Pi 3/2)=0.766(24)D$, and $\mu (B2\Sigma +)=0.744(84)D$, while for SrOH the values were $\mu (X2\Sigma +)=1.900(14)D$, $\mu (A2\Pi 1/2)=0.590(45)D,\mu (A2\Pi 3/2=0.424(24)D$, and $\mu (B2\Sigma +)=0.396(84)D$. The results are compared to rent theoretical predictions. A description of the supersonic molecular beam spectrometer will be given and results of our attempts to measure the pure rotational spectra of these molecules using the an optical pump/probe detection scheme will be presented.