Radiative branching ratios for excited states of 174YbF: Application to laser cooling

I. J. Smallman, F. Wang, Timothy Steimle, M. R. Tarbutt, E. A. Hinds

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


We excite YbF molecules to low-lying vibrational levels of the A 2Π1/2 state, and of the nearby perturber state sometimes called [18.6]0.5. By dispersing the fluorescence, we measure branching ratios for the radiative decay to vibrational levels of the X 2Σ+ state. These ratios help to determine the optimum laser cooling scheme for the molecule. Our results establish the practicality of a scheme that was previously suggested (Tarbutt et al., 2013) and show how the scheme can be modified to provide a stronger radiative cooling force.

Original languageEnglish (US)
Pages (from-to)3-6
Number of pages4
JournalJournal of molecular spectroscopy
StatePublished - Jun 2014


  • Laser cooling molecules
  • Radiative branching ratios
  • Ytterbium fluoride (YbF)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry


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