[Zheng, Rui; Wang, Rui-Bo; Li, Song; Huang, Guang-Ming; Duan, Chuan-Xi] College of Physical Science and Technology, Huazhong Normal University, Wuhan 430079, China
通讯机构：
[Zheng, R.] C
College of Physical Science and Technology, , Wuhan 430079, China
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...
