Bose-Einstein Condensation of Atomic Hydrogen
Abstract
We report observation of Bose-Einstein condensation of a trapped, dilute gas of atomic hydrogen. The condensate and normal gas are studied by two-photon spectroscopy of the 1S-2S 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 4.8 +/- 1.1 × 1015 cm-3, corresponding to a condensate population of 109 atoms. The BEC transition occurs at about T=50 uK and n=1.8 × 1014 cm-3.
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