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 Title: LIF spectroscopy OF jet cooled MgOH Author(s): Fukushima, Masaru Contributor(s): Ishiwata, Takashi Subject(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. Issue Date: 2014-06-16 Publisher: International Symposium on Molecular Spectroscopy Citation Info: Fukushima, M.; Ishiwata, T. LIF SPECTROSCOPY OF JET COOLED MgOH. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.MG10 Genre: CONFERENCE PAPER/PRESENTATION Type: Text Language: English URI: http://hdl.handle.net/2142/50918 DOI: 10.15278/isms.2014.MG10 Rights Information: Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/ Date Available in IDEALS: 2014-09-172015-04-14
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