ISOLATED SMALL-AMPLITUDE FUNDAMENTALS EMBEDDED IN A PURE TORSIONAL BATH: FIR AND MW SPECTRA OF THE ν10 VIBRATIONAL MODE AND HOT TORSIONAL BANDS OF ACETALDEHYDE

Ilyushin, V.

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https://hdl.handle.net/2142/104228 Copy

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Title

ISOLATED SMALL-AMPLITUDE FUNDAMENTALS EMBEDDED IN A PURE TORSIONAL BATH: FIR AND MW SPECTRA OF THE ν10 VIBRATIONAL MODE AND HOT TORSIONAL BANDS OF ACETALDEHYDE

Author(s)

Ilyushin, V.

Contributor(s)

Hougen, Jon T.; Kleiner, Isabelle ; Mellau, Georg Ch.; Sydow, Christian ; Maul, Christof ; Bauerecker, Sigurd ; Pirali, Olivier ; Goubet, Manuel ; Motiyenko, R. A.; Margulès, L. ; Kalambet, Mariia ; Dorovskaya, Olga ; Alekseev, E. A.

Issue Date

2019-06-17

Keyword(s)

Large amplitude motions, internal rotation

Abstract

We present\footnote{This talk is dedicated to the memory of Dr. Jon T. Hougen (who recently passed away) in recognition of his essential contribution to this project.} the results of achieved progress in our analysis of the far-IR and microwave spectra of the \nub{10} vibrational state of acetaldehyde\footnote{This work was done under support of the Volkswagen foundation. The assistance of STCU is acknowledged (partner project P686).}. The analysis of the gs - \nub{10} band near 509 \wn involves the energy levels that belong to the v$_t$ =0, 1 torsional states of \nub{10} vibrational mode as well as v$_t$ =0, 1, 2, 3, 4 torsional states of the ground vibrational state. The intervibrational interactions between \nub{10} vibrational state and torsional bath is taken explicitly into account with the help of a new program which was recently developed for fitting several isolated small-amplitude fundamentals embedded in a pure torsional bath in molecules with C$_{s}$ frame and C$_{3v}$ top. Obtained results provide significant progress in comparison with the previous fitting attempts for gs - \nub{10} band of acetaldehyde near 509 \wn. In the talk the details of the results with emphasis on the remaining fitting problems for the hot torsional bands\footnote{The authors are indebted to Dr. A.R.W. McKellar for providing raw spectrum data on torsional bands of acetaldehyde from previous study.} of acetaldehyde will be discussed.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/104228

DOI

10.15278/isms.2019.MI05

Copyright and License Information

Copyright 2019 V. Ilyushin

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