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Title:Inversion vibrational energy levels of AsH3 + studied by zero-kinetic-energy photoelectron spectroscopy
Author(s):Mo, Yuxiang
Subject(s):Spectroscopy of Large Amplitude Motions
Abstract:The rotational-resolved vibrational spectra of AsH$_{3}$ $^{+}$ have been measured for the first time with vibrational energies up to 6000 \wn above the ground state using zero-kinetic energy photoelectron spectroscopic method. The inversion vibrational energy levels (\nub{2}) and the corresponding rotational constants for the \nub{2} =0-16 have been determined. The tunneling splittings of the inversion vibration energy levels have been observed for the ground and the first excited vibrational states. The geometric parameters of AsH$_{3}$ $^{+}$ as a function of inversion vibrational quantum states have been determined, indicating that the geometric structure of the cation changes from near planar structure to a pyramidal structure with more vibrational excitations. In addition to the experimental measurement, a two-dimensional theoretical calculation including the two symmetric vibrational modes was performed to determine the energy levels of the symmetric inversion and As-H stretching vibrations. The calculated vibrational energy levels are in good agreement with the experimental results. The first adiabatic ionization energy (IE) for AsH$_{3}$ was also accurately determined. The result of this work will be compared with our published result on the PH$_{3}$$^{+}$.
Issue Date:2016-06-21
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper/Presentation
Rights Information:Copyright 2016 by the authors
Date Available in IDEALS:2017-01-26

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