Abstract This paper reports that the absorption spectra of H2O+ have been measured by tunable mid-infrared diode laser spectroscopy in the spectral range of 1100--1380cm-1. The H2O+ ions are generated in an AC glow discharge of the gaseous mixtures of H2O/He and detected with the velocity modulation technique. Forty new lines are assigned to the $\nu_2$ fundamental band of H2O+ ($\tilde{X}^2B_1$). The observed lines together with other data published previously are fitted to the standard effective Hamiltonian of an asymmetric top, yielding a set of improved rotational constants, spin-rotation constants and their quartic and sextic centrifugal distortion constants for the $\nu_2=1$ vibrational state of H2O+.
Received: 14 March 2008
Revised: 08 April 2008
Accepted manuscript online:
(Vibronic, rovibronic, and rotation-electron-spin interactions)
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 10544002 and
10604019).
Cite this article:
Zheng Rui (郑锐), Li Song (李松), Hou Shun-Yong (侯顺永), Huang Guang-Ming (黄光明), Duan Chuan-Xi (段传喜) A new analysis of the $\nu_2$ fundamental band of H2O+ 2008 Chin. Phys. B 17 4485
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