TY - JOUR

T1 - Fluorescence branching ratios and magnetic tuning of the visible spectrum of SrOH

AU - Nguyen, Duc Trung

AU - Steimle, Timothy C.

AU - Kozyryev, Ivan

AU - Huang, Meng

AU - McCoy, Anne B.

N1 - Funding Information:
Supported by grants from the National Science Foundation (TN and TCS: CSDM-A; CHE-1265885; ABM: CTC; CHE-1619660; IK PHY-1505961) and from the Graduate School at The Ohio State University (MH: Presidential Fellowship) is gratefully acknowledged. The authors thank Prof. Andrew Chizmeshya (Arizona State University) for his helpful comments and Prof. John M. Doyle (Department of Physics, Harvard University) for suggesting this project.
Publisher Copyright:
© 2018

PY - 2018/5

Y1 - 2018/5

N2 - The magnetic tuning of the low rotational levels in the X̃2Σ+ (0,0,0), Ã2Πr (0,0,0), and B̃2Σ+ (0,0,0) electronic states of strontium hydroxide, SrOH, have been experimentally investigated using high resolution optical field-free and Zeeman spectroscopy of a cold molecular beam sample. The observed Zeeman shifts and splittings are successfully modeled using a traditional effective Hamiltonian approach to account for the interaction between the Ã2Πr and B̃2Σ+ states. The determined magnetic g-factors for the X̃2Σ+, Ã2Πr, and B̃2Σ+ states are compared to those predicted by perturbation theory. The dispersed fluorescence resulting from laser excitation of rotationally resolved branch features of the 00 0 B̃2Σ+←X̃2Σ+, 00 0 Ã2Π3/2←X̃2Σ+ and 00 0 Ã2Π1/2←X̃2Σ+ transitions have been recorded and analyzed. The measured fluorescence branching ratios are compared with Franck-Condon calculations. The required bending motion wave functions are derived using a discrete variable representation (DVR) method. Implications for laser slowing and magneto-optical trapping experiments for SrOH are described.

AB - The magnetic tuning of the low rotational levels in the X̃2Σ+ (0,0,0), Ã2Πr (0,0,0), and B̃2Σ+ (0,0,0) electronic states of strontium hydroxide, SrOH, have been experimentally investigated using high resolution optical field-free and Zeeman spectroscopy of a cold molecular beam sample. The observed Zeeman shifts and splittings are successfully modeled using a traditional effective Hamiltonian approach to account for the interaction between the Ã2Πr and B̃2Σ+ states. The determined magnetic g-factors for the X̃2Σ+, Ã2Πr, and B̃2Σ+ states are compared to those predicted by perturbation theory. The dispersed fluorescence resulting from laser excitation of rotationally resolved branch features of the 00 0 B̃2Σ+←X̃2Σ+, 00 0 Ã2Π3/2←X̃2Σ+ and 00 0 Ã2Π1/2←X̃2Σ+ transitions have been recorded and analyzed. The measured fluorescence branching ratios are compared with Franck-Condon calculations. The required bending motion wave functions are derived using a discrete variable representation (DVR) method. Implications for laser slowing and magneto-optical trapping experiments for SrOH are described.

KW - Branching ratios

KW - Franck-Condon factors

KW - Strontium hydroxide

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U2 - 10.1016/j.jms.2018.02.007

DO - 10.1016/j.jms.2018.02.007

M3 - Article

AN - SCOPUS:85043602520

SN - 0022-2852

VL - 347

SP - 7

EP - 18

JO - Journal of Molecular Spectroscopy

JF - Journal of Molecular Spectroscopy

ER -