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 Title: Observation And Laser Spectroscopy Of Ytterbium Monomethoxide, Yboch3 Author(s): Augenbraun, Benjamin Contributor(s): Doyle, John M.; Le, Anh T.; Sawaoka, Hiromitsu; Frenett, Alexander; Lasner, Zack; Steimle, Timothy Subject(s): Mini-symposium: Precision Spectroscopy for Fundamental Physics Abstract: We describe a laser spectroscopic study of ytterbium monomethoxide, a species of interest to search for time-reversal symmetry violation using laser-cooled molecules. We have performed measurements of vibrational structure in the low-lying electronic states, vibrational branching ratios for several electronically excited vibronic states, and radiative lifetimes of low-lying electronic states. Both laser-induced fluorescence and dispersed fluorescence spectra have been recorded and analyzed. In addition, we have recorded the rotationally-resolved high-resolution excitation spectrum of the $\tilde{A}\,^2E_{1/2} \leftarrow \tilde{X}\,^2A_1$ band. \textit{Ab initio} calculations aided the assignment of vibronic emission bands and provide insight into the electronic and vibrational structure. We compare the structure of YbOCH$_3$ to the isoelectronic species YbF and YbOH, as well as to the previously studied alkaline-earth monomethoxides. Finally, we discuss how our results open a path to increased sensitivity to P- and/or T-violating physics in future measurements. Issue Date: 2021-06-24 Publisher: International Symposium on Molecular Spectroscopy Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/111160 Date Available in IDEALS: 2021-09-24
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