Abstract
We report the realization of Bose-Einstein condensation (BEC) in diluterubidium gas. The BEC was achieved in a quadrupole and Ioffeconfiguration trap. The number of condensed atoms is around4×104 in total 5×105, and the transition temperature is250 nK. We have studied the light scattering of the atom cloud and thecondensate in a tightly confined magnetic trap. We show that it ispossible to use the diffraction patterns in the near-resonant imagingof the trapped cold atomic samples to give the information of the BECphase transition.
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