Observation of the visible absorption spectrum of H2O+

Article abstract of DOI:10.1063/1.461215

The <*>A²<*>A₁-<*>X²<*>B₁ system of H2O⁺ has been observed, using laser absorption spectroscopy in a velocity-modulated discharge.A total of 78 transitions between 14 794 and 15 475 cm^-1 have been observed with an uncertainty (1 SD) of 0.02 cm^-1, including 76 transitions in the (0,7,0)-(0,0,0) band and 2 in the (0,8,0)-(0,0,0) band.This species is important for cometary astronomy, and intriguing for molecular physics because of its prominent Renner-Teller interaction.Careful measurements were made of the relative intensities of the absorption lines, which were measured to an accuracy of 13percent (1 SD).This is the first observation of the <*>A-<*>X transition in absorption; all previous data were obtained in emission with conventional grating spectroscopy.The transition frequencies of our new data are in good agreement with previous work, and have improved accuracy.The new data have definite rejection of the interfering lines from excited neutral H2 that plagues previous work.Compared with previous work, the new data have the first quantitative measurement of intensities.The ratio of the Franck-Condon factors I₈/I₇ = 0.99 +/- 0.43 has been measured for the first time, where I_v = FCF<(0,υ',0)-(0,0,0)>.

Full text of DOI:10.1063/1.461215

Observation of the visible absorption spectrum of H2O+
Biman Das and John W. Farley
Citation: J. Chem. Phys. 95, 8809 (1991); doi: 10.1063/1.461215
View online: http://dx.doi.org/10.1063/1.461215
View Table of Contents: http://jcp.aip.org/resource/1/JCPSA6/v95/i12
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Downloaded 19 Aug 2013 to 131.211.208.19. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 19 Aug 2013 to 131.211.208.19. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 19 Aug 2013 to 131.211.208.19. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 19 Aug 2013 to 131.211.208.19. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 19 Aug 2013 to 131.211.208.19. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 19 Aug 2013 to 131.211.208.19. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions

Downloaded 19 Aug 2013 to 131.211.208.19. This article is copyrighted as indicated in the abstract. Reuse of AIP content is subject to the terms at: http://jcp.aip.org/about/rights_and_permissions