Abstract.
The recent creation of a Bose–Einstein condensate of atomic hydrogen has added a new system to this exciting field. The differences between hydrogen and the alkali metal atoms require other techniques for the initial trapping and cooling of the atoms and the subsequent detection of the condensate. The use of a cryogenic loading technique results in a larger number of trapped atoms. Spectroscopic detection is well suited to measuring the temperature and density of the sample in situ. The transition was observed at a temperature of 50 μK and a density of 2×1014 cm-3. The number of condensed atoms is about 109 at a condensate fraction of a few percent. A peak condensate density of 4.8×1015 cm-3 has been observed.
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Received: 22 June 1999 / Published online: 3 November 1999
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Willmann, L. Bose–Einstein condensation of atomic hydrogen. Appl Phys B 69, 357–361 (1999). https://doi.org/10.1007/s003400050820
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DOI: https://doi.org/10.1007/s003400050820