HIGH RESOLUTION SPECTROSCOPIC PROBES OF LARGE AMPLITUDE VIBRATION: THE $(0,22,0)\Pi$ AND $(0,24,0)\Pi$ LEVELS OF $NH_{2}({^{2}}A_{1})$
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Date
2002
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Ohio State University
Abstract
We will report on the spectroscopy, fluorescence lifetime, hyperfine and Zeeman properties of levels in the $NH_{2}(^{2}A_{1})$ state that are associated with large amplitude vibrational motion, focusing on $(0,22,0)\Pi$ and $(0,24,0)\Pi$. Consistent with previous work, we find that the rotational structure of $(0,22,0)\Pi$ is largely unperturbed and is well fit by a model Hamiltonian, from which the spectroscopic parameters were extracted. A similar analysis applied to $(0,24,0)\Pi$ reveals some scattered perturbations. The measured fluorescence lifetimes are in good agreement with theoretical predictions. Hyperfine and Zeeman quantum beat studies allow determination of the $^{1}$H hyperfine structure and elucidation of the weak field Lande g-factors, which provide detailed information on couplings with other electronic states.
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Author Institution: Dept. of Chemistry, Marquette University