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Title:ULTRAVIOLET AND INFRARED OSCILLATOR STRENGTHS FOR OH+
Author(s):Bittner, Dror M.
Contributor(s):Bernath, Peter F.; Hodges, James Neil
Subject(s):Astronomy
Abstract:OH$^+$ is an important astrophysical species. OH+ has been detected in the interstellar medium by UV and terahertz spectroscopy. Following the recent analysis of OH$^+$ emission spectra,\footnote{Hodges, J. N., \& Bernath, P. F. Astrophys. J., 840.2 (2017) 81} empirical potential energy surfaces have been calculated for the A$^3$$\Pi$ and X$^3$$\Sigma$$^-$ states using the RKR method. Ab initio transition and dipole moment functions were calculated and together with the potential energy surfaces have been used to compute oscillator strengths using Le Roy’s LEVEL program.\footnote{Le Roy, R. J., J. Quant. Spectrosc. Radiat. Transf. 186 (2017) 167} The new oscillator strengths account for the Herman–Wallis effect, a rotational dependence in the vibrational wavefunction, and are now in good agreement with the measured lifetime.\footnote{M\"{o}hlmann, G. R., et al., Chem. Phys. 31.2 (1978) 273} The Herman–Wallis effect creates a 5\% difference in UV oscillator strengths by J'' = 15 and an 80\% difference in oscillator strengths by J'' = 10 in the IR. We recommend these new oscillator strengths be used to determine OH$^+$ column densities.
Issue Date:06/20/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100529
DOI:10.15278/isms.2018.WL07
Other Identifier(s):WL07
Date Available in IDEALS:2018-08-17
2018-12-12


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