Branching Ratios, Radiative Lifetimes, and Transition Dipole Moments for YbOH

Ephriem Tadesse Mengesha, Anh T. Le, Timothy C. Steimle, Lan Cheng, Chaoqun Zhang, Benjamin L. Augenbraun, Zack Lasner, John Doyle

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)3135-3148
Number of pages14
JournalJournal of Physical Chemistry A
Issue number16
StatePublished - Apr 23 2020

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry


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