High resolution electronic spectroscopy of Ne⋅OH

• Published in: The Journal of chemical physics 1992-03, Vol.96 (5), p.3476-3483
• Main Authors: Chang, Bor-Chen, Cullin, David W., Williamson, James M., Dunlop, James R., Rehfuss, Brent D., Miller, Terry A.
• Format: Article
• Language: English
• ISSN: 0021-9606; 1089-7690
• DOI: 10.1063/1.461901

The high resolution electronic spectrum of Ne⋅OH has been recorded in a supersonic free jet expansion using the laser-induced fluorescence technique. From an analysis of the spectrum which yields rotational constants, we are able to obtain Ne⋅OH bond lengths in several vibrational (hindered rotor) levels of the excited state and the vibrationless level of the ground state. We also measure the Fermi contact constant in the à state which is, unlike Ar⋅OH, insignificantly perturbed from the value in the OH monomer. However, we now measure a parity doubling of the X̃ state rotational levels which is tenfold larger than the upper limit we established for such an interaction in Ar⋅OH. We interpret these latter measurements to imply weaker and more isotropic bonding in Ne⋅OH compared to Ar⋅OH in both electronic states.