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Vibrational spectra and intramolecular vibrational redistribution in methane and its isotopomers |
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| Authors: | Hou Xi-Wen Wan Ming-Fang Ma Zhong-Qi |
| Institution: | a Department of Physics, Huazhong Normal University, Wuhan 430079, China;b School of Natural Science, Wuhan University of Technology, Wuhan 430079, China;c Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | An improved U(2) algebraic model is introduced to study the stretching and bending vibrational spectra of methane and its isotopomers. The algebraic model with fewer parameters reproduces the experimental spectra with good precision. Moreover, the obtained parameters describe well the correct behavior of isotopic substitution. It is shown that the Fermi resonance leads to a very fast intramolecular vibrational redistribution among stretches and bends. |
| Keywords: | algebraic methods vibrational spectra intramolecular vibrational redistribution |
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