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 Title: Analysis Of The Far Ir Spectrum Of Trimethylene Sulfide Using Evolutionary Algorithms Author(s): van Wijngaarden, Jennifer Contributor(s): Meerts, W. Leo; Desmond, Durell Subject(s): Large amplitude motions, internal rotation Abstract: Rotationally-resolved vibrational spectra have been collected from 100-1000 cm$^{-1}$ for the four-membered ring trimethylene sulfide (c-C$_{3}$H$_{6}$S) using synchrotron light at the far infrared beamline of the Canadian Light Source. The spectra are complicated by the presence of ring inversion tunneling which gives rise to dense patterns of overlapping rotation-vibration-inversion transitions in the infrared region. These are well-resolved using the Bruker IFS125HR instrument. In this talk, we will discuss the progress of the analysis of the two lowest frequency bands which correspond to the {\it c-}type ring puckering vibration at 139 cm$^{-1}$, and the {\it a-}type in-plane ring deformation at 529 cm$^{-1}$. The ideas of genetic evolution via evolutionary strategies have been used to aid in the analysis of the observed spectra. In particular, we have applied the covariance matrix adaptation evolution strategy which uses the concept of mutation and the results of previous trials to give solutions to fit the quite dense spectra. Issue Date: 2014-06-19 Publisher: International Symposium on Molecular Spectroscopy Citation Info: van Wijngaarden, J.; Meerts, W.L.; Desmond, D. ANALYSIS OF THE FAR IR SPECTRUM OF TRIMETHYLENE SULFIDE USING EVOLUTIONARY ALGORITHMS. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.RJ09 Genre: CONFERENCE PAPER/PRESENTATION Type: Text Language: English URI: http://hdl.handle.net/2142/51021 DOI: https://doi.org/10.15278/isms.2014.RJ09 Rights Information: Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/ Date Available in IDEALS: 2014-09-172015-04-14
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