| Original Articles |
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Extended Measurement of the v2 (1- ←0+) Band of H3O+ by Mid-Infrared Diode Laser Spectroscopy |
| ZHENG Rui;WANG Rui-Bo;LI Song;HUANG Guang-Ming;DUAN Chuan-Xi |
| College of Physical Science and Technology, Huazhong Normal University, Wuhan 430079 |
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| Cite this article: |
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ZHENG Rui, WANG Rui-Bo, LI Song et al 2007 Chin. Phys. Lett. 24 2569-2571 |
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Abstract Twenty-five new R-branch lines of the v2 (1- ←0+) band of H3O+ are measured using diode laser velocity modulation spectroscopy between 1070 and 1230 cm-1. The H3O+ ions are produced in a high voltage ac discharge with water diluted in helium. The observed lines together with all the previously published measurements are fit to the standard vibration-rotational Hamiltonian of an oblate symmetric top, yielding a set of improved molecular constants. All the sextic centrifugal distortion constants for both 0+ and 1- states are determined precisely. The observed R(13, 0) transition
is shifted about -0.129cm-1 from its calculated value, indicating that a near degeneracy exists between the (13, 0)+ and (13, 3)- ground-state rotation-inversion levels.
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| Keywords:
33.20.Vq
33.15.Mt
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Received: 02 July 2007
Published: 16 August 2007
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| PACS: |
33.20.Vq
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(Vibration-rotation analysis)
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33.15.Mt
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(Rotation, vibration, and vibration-rotation constants)
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