THE OPTICAL SPECTRUM OF SrOH RE-VISITED: ZEEMAN EFFECT, HIGH-RESOLUTION SPECTROSCOPY AND FRANCK-CONDON FACTORS.

Nguyen, Trung

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https://hdl.handle.net/2142/79379 Copy

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Title

THE OPTICAL SPECTRUM OF SrOH RE-VISITED: ZEEMAN EFFECT, HIGH-RESOLUTION SPECTROSCOPY AND FRANCK-CONDON FACTORS.

Author(s)

Nguyen, Trung

Contributor(s)

• Doyle, John M.
• Kozyryev, Ivan
• Steimle, Timothy
• Kokkin, Damian L

Issue Date

26-Jun-15

Keyword(s)

Electronic structure, potential energy surfaces

Abstract

Motivated by a diverse range of applications in physics and chemistry, currently there is great interest in the cooling of molecules to very low temperatures ($leq$1,mK). Direct laser cooling has been previously demonstrated for the diatomic radicals SrFfootnote{E.S. Shuman, J.F. Barry and D. DeMille, Nature 467, 820 (2010)}$^,$footnote{J.F. Barry, E.S. Shuman, E.B. Norrgard and D. DeMille, Phys. Rev. Lett. 108, 103002 (2012)}, YOfootnote{M.T. Hummon, M. Yeo, B.K. Stuhl, A.L. Collopy, Y. Xia, and J. Ye, Phys. Rev. Lett. 110, 143001 (2013)}$^,$footnote{M. Yeo, M.T. Hummon, A.L. Collopy, B. Yan, B. Hemmerling, E. Chae, J.M. Doyle, and J. Ye, arXiv:1501.04683 (2015)}, and CaFfootnote{V. Zhelyazkova, A. Cournol, T.E. Wall, A. Matsushima, J.J. Hudson, E.A. Hinds, M.R. Tarbutt, and B.E. Sauer, Phys. Rev. A 89, 053416 (2014)}, and most recently a three-dimensional magneto-optical trap (MOT) of SrF molecules was achievedfootnote{J.F. Barry, D.J. McCarron, E.B. Norrgard, M.H. Steinecker and D. DeMille, Nature 512, 286 (2014)}$^,$footnote{D.J. McCarron, E.B. Norrgard, M.H. Steinecker and D. DeMille, arXiv:1412.8220 (2014)}. To determine the possibility of laser cooling for polyatomic molecules containing three or more atoms, detailed information is required about their Franck-Condon factors (FCFs) for emission from the excited states of interest. Here we report on the high-resolution laser excitation spectra, recorded field-free and in the presence of a static magnetic field, and on the dispersed fluorescence (DF) spectra for the $A^2Pi_{1/2} leftarrow X^2Sigma^+$ and $B^2Sigma^+ leftarrow X ^2Sigma^+$ electronic transitions of SrOH. The DF spectra were analyzed to precisely determine FCFs and compared with values predicted using a normal coordinate GF matrix approach. The recorded Zeeman spectra were analyzed to determine the magnetic moments. Implication for proposed laser cooling and trapping experiments for SrOH will be presented.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

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http://hdl.handle.net/2142/79379

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