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

Description

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

eng

Permalink

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

DOI

https://doi.org/10.15278/isms.2019.MI05

Copyright and License Information

Copyright 2019 V. Ilyushin

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