Rotational Spectrum Of Cd3od: New Measurements And Assignments In The Vt = 0, 1 And 2 Torsional States

Ilyushin, V.

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https://hdl.handle.net/2142/116593 Copy

Description

Title

Rotational Spectrum Of Cd3od: New Measurements And Assignments In The Vt = 0, 1 And 2 Torsional States

Author(s)

Ilyushin, V.

Contributor(s)

• Lees, Ronald M.
• Maul, Christof
• Schlemmer, Stephan
• Lewen, Frank
• Müller, Holger S. P.
• Dorovskaya, Olga
• Alekseev, E. A.
• Porohovoi, R.

Issue Date

2022-06-22

Keyword(s)

Astronomy

Abstract

We present\footnote{We are grateful for the support of the Deutsche Forschungsgemeinschaft and the Volkswagen foundation. The assistance of the Science and Technology Center in Ukraine is acknowledged (STCU partner project P756).} the results of our new study of the torsion-rotation spectrum of the fully deuterated isotopolog of methanol (CD$_3$OD). The new measurements were carried out from the millimeter wave range (starting at 34.5~GHz) to the terahertz range (up to 1.1~THz) using spectrometers in Kharkiv and K{\"o}ln. We extend the rotational quantum number coverage up to $J_{\rm max} = 50$ in this work. The analysis is done using the rho axis method and the RAM36 program code, as in our earlier studies on CD$_3$OH\footnote{V. V. Ilyushin et al., {\it Astron. Astrophys.} {\bf 658} (2022) A127} and CH$_3$OD. Our preliminary fits show that the $v_{\rm t} = 2$ torsional state is affected by intervibrational interactions with non-torsional vibrational modes which propagate down through intertorsional interactions, similar to the cases of CD$_3$OH and CH$_3$OD. Taking into account the astrophysical significance of methanol and its isotopologs, we decided at this stage of the analysis to concentrate our fitting attempts on the ground and first excited torsional states of CD$_3$OD. We will present the status of our investigations.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Handle URL

https://hdl.handle.net/2142/116593&&

DOI

https://doi.org/10.15278/isms.2022.WN05

Copyright and License Information

Copyright 2022 held by the authors

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