LIF spectroscopy OF jet cooled MgOH

Fukushima, Masaru

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https://hdl.handle.net/2142/50918 Copy

Description

Title

LIF spectroscopy OF jet cooled MgOH

Author(s)

Fukushima, Masaru

Contributor(s)

Ishiwata, Takashi

Issue Date

2014-06-16

Keyword(s)

Small molecules

Abstract

We have generated MgOH in supersonic free jet expansions, and observed the laser induced fluorescence (~LIF~) of the $\tilde{A}$ $^2\Pi$ -- $\tilde{X}$ $^2\Sigma^+$ transition. We have reported rotational analyses of the bending vibronic bands, $2_0^n$, $n$ = 0, 2, and 4,\footnote{M.~Fukushima and T.~Ishiwata, The 21st Colloquium on High-Resolution Molecular Spectroscopy, F8 (2009).} and it has been found that the spin-orbit constant of the bending vibronic levels, $\tilde{A}$ $^2\Pi$ $(0n^00)$ $\mu$ $^2\Pi$, increases with increasing the bending vibrational quantum number, $n$. This observation is interpreted as the lower level possessing primarily bent character and the higher level possessing linear character. The bending potential surface of the $\tilde{A}$ $^2\Pi$ state is thought to be the reason for the present observation and interpretation. This potential surface is thought to be fairly flat and anharmonic with bent and linear geometries at the $r_e$ and $r_0$ structures, respectively. We also observed the other two vibronic bands at almost the middle between the $2_0^2$ and $2_0^4$ bands. One of the two has a similar rotational structure with that of the origin band, $0_0^0$, and is assigned to be the Mg--OH stretching vibronic band, $\tilde{A}$ $^2\Pi$ $(00^01)$ -- $\tilde{X}$ $^2\Sigma^+$ $(00^00)$. The rotational structure of another vibronic band is very complex, and it seems to overlap, at least, two vibronic bands, $^2\Pi$ -- and $^2\Sigma^{(+)}$ -- $^2\Sigma^+$. More precise analysis is underway.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50918

DOI

https://doi.org/10.15278/isms.2014.MG10

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

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