A cold and slow molecular beam.

@article{Lu2011ACA,
  title={A cold and slow molecular beam.},
  author={Hsin-I Lu and Julia Rasmussen and Matthew J. Wright and David Patterson and John M. Doyle},
  journal={Physical chemistry chemical physics : PCCP},
  year={2011},
  volume={13 42},
  pages={
          18986-90
        }
}
Employing a two-stage cryogenic buffer gas cell, we produce a cold, hydrodynamically extracted beam of calcium monohydride molecules with a near effusive velocity distribution. Beam dynamics, thermalization and slowing are studied using laser spectroscopy. The key to this hybrid, effusive-like beam source is a "slowing cell" placed immediately after a hydrodynamic, cryogenic source [Patterson et al., J. Chem. Phys., 2007, 126, 154307]. The resulting CaH beams are created in two regimes. In one… 

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