High-resolution optical spectroscopy with a buffer-gas-cooled beam of BaH molecules

  title={High-resolution optical spectroscopy with a buffer-gas-cooled beam of BaH molecules},
  author={Geoffrey Z. Iwata and Rees L. McNally and Tanya Zelevinsky},
  journal={Physical Review A},
Barium monohydride (BaH) is an attractive candidate for extending laser cooling and trapping techniques to diatomic hydrides. The apparatus and high-resolution optical spectroscopy presented here demonstrate progress toward this goal. A cryogenic buffer-gas-cooled molecular beam of BaH was constructed and characterized. Pulsed laser ablation into cryogenic helium buffer gas delivers $\sim1\times10^{10}$ molecules/sr/pulse in the X$^2\Sigma^+$ ($v''=0,N''=1$) state of primary interest… 

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