An experimental researcher whose team observed Bose-Einstein condensation in sodium gas in 1995. A trap combining magnetic and optical forces allowed evaporative cooling to greatly increase the cloud’s phase-space density. Images after release developed two distinct components: a broad thermal cloud and a dense, elliptically expanding core. Their appearance made the transition measurable and provided an experimental system for studying the collective behavior of a dilute quantum gas.[ref]
Bose-Einstein Condensation in a Gas of Sodium Atoms by K. B. Davis and others. Abstract: hybrid trap, evaporation, phase-space density and bimodal expansion distribution
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