University of Illinois Urbana-Champaign

Room temperature line lists for CO2 isotopologues with AB initio computed intensities

Zak, Emil

Content Files
1579.pdf
579493.pdf

Permalink

https://hdl.handle.net/2142/91093

Description

Title
Room temperature line lists for CO2 isotopologues with AB initio computed intensities
Author(s)
Zak, Emil
Contributor(s)
  • Perevalov, Valery
  • Tashkun, Sergey
  • Zobov, Nikolay Fedorovich
  • Lodi, Lorenzo
  • Polyansky, Oleg
  • Tennyson, Jonathan
Issue Date
2016-06-21
Keyword(s)
Theory and Computation
Date of Ingest
2017-01-26T21:39:55Z
Abstract
We report 13 room temperature line lists for all major CO$_2$ isotopologues, covering 0-8000 \wn. These line lists are a response to the need for line intensities of high, preferably sub-percent, accuracy by remote sensing experiments. Our scheme encompasses nuclear motion calculations supported by critical reliability analysis of the generated line intensities. Rotation-vibration wavefunctions and energy levels are computed using DVR3D and a high quality semi-empirical potential energy surface (PES) [1], followed by computation of intensities using a fully \textit{ab initio} dipole moment surface (DMS). Cross comparison of line lists calculated using pairs of high-quality PES's and DMS's is used to assess imperfections in the PES, which lead to unreliable transition intensities between levels involved in resonance interactions. Four line lists are computed for each isotopologue to quantify sensitivity to minor distortions of the PES/DMS. This provides an estimate of the contribution to the overall line intensity error introduced by the underlying PES. Reliable lines are benchmarked against recent state-of-the-art measurements [2] and HITRAN-2012 supporting the claim that the majority of line intensities for strong bands are predicted with sub-percent accuracy [3]. Accurate line positions are generated using an effective Hamiltonian [4]. We recommend use of these line lists for future remote sensing studies and inclusions in databases. \vspace{15px} \small \renewcommand{\section}[2]{} \begin{thebibliography}{5} \setlength{\parskip}{0pt} \setlength{\itemsep}{0pt plus 0.3ex} \bibitem{12HuScTa.CO2} X.~Huang, D.~W. Schwenke, S.~A. Tashkun, T.~J. Lee, J. Chem. Phys. 136, 124311, 2012. \bibitem{jt613} O. ~L. Polyansky, K. Bielska, M. Ghysels, L. Lodi, N. ~F. Zobov, J. ~T. Hodges, J. Tennyson, PRL, 114, 243001, 2015. \bibitem{jt625} E. Zak, J. Tennyson, O.~L. Polyansky, L. Lodi, S.~A. Tashkun, V.~I. Perevalov, JQSRT, in press and to be submitted. \bibitem{15TaPeGa.CO2} S.~A. Tashkun, V.~I. Perevalov, R.~R. Gamache, J.~Lamouroux, JQSRT, 152, 45--73, 2015. \end{thebibliography}
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
En
Permalink
http://hdl.handle.net/2142/91093
Copyright and License Information
Copyright 2016 by the authors

Owning Collections

Abstracts & Presentations - 2016 International Symposium on Molecular Spectroscopy PRIMARY