Knowledge Bank

Laser induced fluoresecnce spectra have been recorded for the $A2\Sigma +-X2\Pi 3/2$ systems of Ne-OH and Ne-OD. Bands of the complexes were observed in conjunction with excitation of the OH/D 1-0 and 0-0 transitions. All of the band originated from the ground state zero point level. Ground state rotational constants of $B0=0.130\pm 0.003$ and $0.127\pm 0.003cm$ were found for the H and D isotopes, respectively. Bands corresponding to excitation of the van der Waals stretch and bend stretch combinations in the $A2\Sigma +$ slate were seen. The energy ranges encompassed by these features provided lower limits for the van der Waals dissociation energies of $D0\prime >61.8cm-1(Ne-OH(A))$ and $68.5cm-1(Ne-OD(A))$. Analysis of the vibronic structure, based on ab - intio potential energy surfaces for the upper and lower electronic states, is in progress. Prelimentry results indicate that NeOH(X) executes an almost free internal rotation. As a consequence, the LIF spectrum probes a large fraction of the excited state surface. Details of the experiment and analysis will be presented