| Extended Measurement of the v2 (1- ←0+) Band of H3O+ by Mid-Infrared Diode Laser Spectroscopy |
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| 作者姓名： | 郑锐 王瑞波 李松 黄光明 段传喜 |
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| 作者单位： | College of Physical Science and Technology, Huazhong Normal University, Wuhan 430079 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10604019 and 10474027, and Natural Science Foundation of Hubei Province under Grant No 2006ABA176. |
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| 摘 要： | 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 -0.129 cm^-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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| 关 键 词： | υ2（1^-← 0^＋） H3O^＋ 红外线 二极管 光谱学 |
| 收稿时间： | 2007-07-02 |
| 修稿时间： | 2007-07-02 |
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