Knowledge Bank

The $A2\Pi -X2\Sigma +$ transitions of CaOH and SrOH and the $B2\Sigma +-X2\Sigma +$ transition of CaOH were rotationally analyzed by Doppler-limited laser excitation spectroscopy with narrow-band fluorescence detection. The major constants are (in $cm-1$, one $\sigma$ uncertanties): To Bo Do $\gamma$o Po Ao CaOH $B2\Sigma +18022.268(1)0.339409(10)3.707(100)\times 10-7-0.043615(46)--A2\Pi 15998.128(1)0.341428(8)3.919(27)\times 10-7--0.043615(46)66.795(1)X2\Sigma +0.00.334354(8)3.869(24)\times 10-70.00111SrOHA2\Pi 14674.338(1)0.253889(3)2.176(4)$$10-7--0.143186(36)263.515(1)X2\Sigma +0.00.249209(3)2.182(3)$$10-70.002433(5)--$ The CaOH and SrOH spectra have many similarities to those of the isolectronic CaF and SrF molecules.