A glass-cell apparatus and a dc magnetic trap with radial gradient of and axial curvature of were used to capture and evaporatively cool rubidium 87 atoms. Below a critical temperature of , Bose-Einstein condensation was observed with 10 6 atoms in the trap. Pure condensates with more than 10 5 atoms and peak densities exceeding were produced.
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Ernst et al. (1998) studied this question.
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