Detection of the MW transition between ortho and para states

Kanamori, Hideto

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

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

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

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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