University of Illinois Urbana-Champaign

Detection of the MW transition between ortho and para states

Kanamori, Hideto

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909059.pptx

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https://hdl.handle.net/2142/96876

Description

Title
Detection of the MW transition between ortho and para states
Author(s)
Kanamori, Hideto
Contributor(s)
  • Endo, Yasuki
  • Mizoguchi, Asao
  • Dehghani, Zeinab Tafti
Issue Date
2017-06-20
Keyword(s)
Fundamental interest
Date of Ingest
  • 2017-07-27T20:15:08Z
  • 2018-01-29T23:05:45Z
Abstract
Thorough the detailed analysis of the hyperfine resolved rotational transitionsfootnote{A. Mizoguchi, S. Ota, H. Kanamori, Y. Sumiyoshi, and Y. Endo, J. Mol. Spectrosc, 250, 86 (2008)}footnote{Z. T. Dehghani, S. Ota, A. Mizoguchi and H. Kanamori, J. Phys. Chem. A, 117(39), 10041, (2013)}, we have been pointed out that there exists not a little interaction between {it ortho} and {it para} states in the molecular Hamiltonian of chem{S_2Cl_2}._x000d_ Using the {it ortho-para} mixed molecular wavefunctions derived from the Hamiltonian, we calculated the transition moment and frequency of the {it ortho-para} forbidden transitions in the cm- and mm-wave region, and picked up some promising candidate transitions for the spectroscopic detection. _x000d_ _x000d_ In the experiment, the chem{S_2Cl_2} vapor with Ar buffer gas in a supersonic jet condition was used with FTMW spectrometer at National Chiao Tung University. _x000d_ As a result, seven hyperfine resolved rotational transitions in the cm-wave region were detected as the {it ortho-para} transition at the predicted frequency within the experimental error range. The observed intensity was 10$^{-3}$ smaller than that of an allowed transition, which is also consistent with the prediction. _x000d_ This is the first time the electric dipole transition between {it ortho} and {it para} states has been detected in a free isolated molecule. _x000d_
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/96876
DOI
https://doi.org/10.15278/isms.2017.TE07
Copyright and License Information
Copyright 2017 Hideto Kanamori

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Abstracts & Presentations - 2017 International Symposium on Molecular Spectroscopy PRIMARY