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Title:SEARCH FOR INVERSION SPLITTING OF PHOSPHINE
Author(s):Okuda, Shoko
Contributor(s):Sasada, Hiroyuki
Subject(s):Mini-symposium: Frequency-Comb Spectroscopy
Abstract:Inversion splitting of phosphine molecules has been one of open questions in molecular spectroscopy. A recent calculation predicted that the splitting is 300 kHz and 3 MHz in the $v_{2}$ = 3 and 4 states [1], where $v_{2}$ is the vibrational quantum number of the \nub{2} mode. We have observed three Q-branch transitions in the 3\nub{2} band of phosphine using a comb-referenced sub-Doppler resolution spectrometer [2]. The spectrometer consists of a difference-frequency-generation source and a cavity-enhanced absorption cell with large beam spot size at beam waist to reduce transit-time broadening. The observed spectral linewidths are 150 kHz, but no inversion splitting has been observed. We now try to observe the 4\nub{2} $-$ \nub{2} hot band. [1] C. Sousa-Silva, J. Tennyson, S. N. Yurchenko, J. Chem. Phys. {\bf 145}, 091102 (2016). [2] S. Okuda, H. Sasada, J. Mol. Spectrosc., in press (2018).
Issue Date:06/20/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100555
DOI:10.15278/isms.2018.WG09
Other Identifier(s):WG09
Date Available in IDEALS:2018-08-17
2018-12-12


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