Abstract
We report observation of Bose-Einstein condensation (BEC) of a trapped, dilute gas of atomic hydrogen. The condensate and normal gas are studied by two-photon spectroscopy of the - transition. Interactions among the atoms produce a shift of the resonance frequency proportional to density. The condensate is clearly distinguished by its large frequency shift. The peak condensate density is , corresponding to a condensate population of atoms. The BEC transition occurs at about and .
- Received 11 September 1998
DOI:https://doi.org/10.1103/PhysRevLett.81.3811
©1998 American Physical Society