Knowledge Bank

The $A2\Pi (020)-X2\Sigma +(000)$ band of CaOH has been observed using CW dye laser excitation, and rotationally analyzed. The measured line positions, in combination with data obtained in our $laboratory1$ for the $A2\Pi (100)-X2\Sigma +(000)$ transition, have been employed in a global deperturbation of the $A(100)2\Pi$ and $A(020)\kappa 2\Pi$ and $\mu 2\Pi$ vibronic states that simultaneously takes account of Fermi resonance, spin-orbit coupling and the Renner-Teller interaction. All the measured line positions are reproduced to within the measurement accuracy of $0.005cm-1$.