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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 Type: Text Language: En URI: http://hdl.handle.net/2142/91138 Rights Information: Copyright 2016 by the authors Date Available in IDEALS: 2017-01-26
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