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Title:Dispersed Laser Induced Fluorescence Study Of canh2 And cash
Author(s):Steimle, Timothy
Contributor(s):Doyle, John M.; Augenbraun, Benjamin; Cheng, Lan; Zhang, Chaoqun; Le, Anh T.
Subject(s):Small molecules
Abstract:The visible electronic transitions of the simple asymmetric top molecules CaSH and CaNH2 have been extensively studied both field-free $\footnote{Z. Morbi, C. Zhao, J.W. Hepburn, and P.F. Bernath, J. Chem. Phys. 108, 8891 (1998).}$, $\footnote{Z. Morbi, C. Zhao, and P.F. Bernath, J. Chem. Phys. 106, 4860 (1997).}$, $\footnote{P.M. Sheridan, M.J. Dick, J.-G. Wang, and P.F. Bernath, Mol. Phys. 105, 569 (2007).}$ and in the presence of static electric field $\footnote{C.T. Scurlock, T. Henderson, S. Bosely, K.Y. Jung, and T.C. Steimle, J. Chem. Phys. 100, (1994).}$, $\footnote{A.J. Marr, M. Tanimoto, D. Goodridge, and T.C. Steimle, J. Chem. Phys. 103, (1995).}$. The diagonal Franck Condon factors for these metal-centered transitions make these molecules appealing for optical cycling studies$^{f}$. These molecules can be readily aligned in the laboratory frame with the application of relatively small static electric field because of their small asymmetry splitting, and relatively large permanent a- and b-components of the electric dipole moments making them attractive as venues for quantum simulation and for investigation of fundamental physics (e.g. parity non-conservation). Here we report on the analysis of the dispersed laser induced fluorescence spectrum induced by both high-resolution and medium resolution laser excitation of the A-X, B-X and C-X bands of \chem{CaNH_2} and the B-X and C-X transitions of \chem{CaSH}. The experimentally determined branching ratios are compared to those predicted based on high-level electronic-structure calculations of potential energy surfaces. The molecules were generated via laser ablation/supersonic expansion and the 2D spectra (excitation $\it{vs}$ DLIF) recorded. Implications for laser cooling of the species will be presented.
Issue Date:2021-06-25
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Date Available in IDEALS:2021-09-24

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