Search for inversion splitting of phosphine

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https://hdl.handle.net/2142/100555

Title: Search for inversion splitting of phosphine
Author(s): Okuda, Shoko
Contributor(s): Sasada, Hiroyuki
Issue Date: 2018-06-20
Keyword(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 v2 = 3 and 4 states [1], where v2 is the vibrational quantum number of the ν2 mode. We have observed three Q-branch transitions in the 3ν2 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 4ν2 − ν2 hot band. [1] C. Sousa-Silva, J. Tennyson, S. N. Yurchenko, J. Chem. Phys. 145, 091102 (2016). [2] S. Okuda, H. Sasada, J. Mol. Spectrosc., in press (2018).
Publisher: International Symposium on Molecular Spectroscopy
Type of Resource: text
Language: eng
Permalink: http://hdl.handle.net/2142/100555
DOI: 10.15278/isms.2018.WG09