TY - JOUR
T1 - Branching Ratios, Radiative Lifetimes, and Transition Dipole Moments for YbOH
AU - Mengesha, Ephriem Tadesse
AU - Le, Anh T.
AU - Steimle, Timothy C.
AU - Cheng, Lan
AU - Zhang, Chaoqun
AU - Augenbraun, Benjamin L.
AU - Lasner, Zack
AU - Doyle, John
N1 - Funding Information:
The research at Arizona State University was supported by a grant from the Heising-Simons Foundation (Grant 2018-0681). The authors thank Prof. Michael Morse (Chemistry Department. University of Utah) for the use of a cw-dye laser system and Prof. Nicholas Hutzler (Division of Physics, Mathematics, and Astronomy, California Institute of Technology) for his insightful comments.
Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/4/23
Y1 - 2020/4/23
N2 - Medium resolution (Δν&tild; ∼3 GHz) laser-induced fluorescence (LIF) excitation spectra of a rotationally cold sample of YbOH in the 17300-17950 cm-1 range have been recorded using two-dimensional (excitation and dispersed fluorescence) spectroscopy. High resolution (Δλ ∼0.65 nm) dispersed laser-induced fluorescence (DLIF) spectra and radiative decay curves of numerous bands detected in the medium resolution LIF excitation spectra were recorded. The vibronic energy levels of the X&tild;2ς+ state were predicted using a discrete variable representation approach and compared with observations. The radiative decay curves were analyzed to produce fluorescence lifetimes. DLIF spectra resulting from high resolution (Δν&tild; < 10 MHz) LIF excitation of individual low-rotational lines in the Ã2π1/2(0,0,0)-X&tild;2ς+(0,0,0), Ã2π1/2(1,0,0)-X&tild;2ς+(0,0,0), and [17.73]ω = 0.5(0,0,0)-X&tild;2ς+(0,0,0) bands were also recorded. The DLIF spectra were analyzed to determine branching ratios which were combined with radiative lifetimes to obtain transition dipole moments. The implications for laser cooling and trapping of YbOH are discussed.
AB - Medium resolution (Δν&tild; ∼3 GHz) laser-induced fluorescence (LIF) excitation spectra of a rotationally cold sample of YbOH in the 17300-17950 cm-1 range have been recorded using two-dimensional (excitation and dispersed fluorescence) spectroscopy. High resolution (Δλ ∼0.65 nm) dispersed laser-induced fluorescence (DLIF) spectra and radiative decay curves of numerous bands detected in the medium resolution LIF excitation spectra were recorded. The vibronic energy levels of the X&tild;2ς+ state were predicted using a discrete variable representation approach and compared with observations. The radiative decay curves were analyzed to produce fluorescence lifetimes. DLIF spectra resulting from high resolution (Δν&tild; < 10 MHz) LIF excitation of individual low-rotational lines in the Ã2π1/2(0,0,0)-X&tild;2ς+(0,0,0), Ã2π1/2(1,0,0)-X&tild;2ς+(0,0,0), and [17.73]ω = 0.5(0,0,0)-X&tild;2ς+(0,0,0) bands were also recorded. The DLIF spectra were analyzed to determine branching ratios which were combined with radiative lifetimes to obtain transition dipole moments. The implications for laser cooling and trapping of YbOH are discussed.
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U2 - 10.1021/acs.jpca.0c00850
DO - 10.1021/acs.jpca.0c00850
M3 - Article
C2 - 32227956
AN - SCOPUS:85084024764
SN - 1089-5639
VL - 124
SP - 3135
EP - 3148
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
IS - 16
ER -