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Phys. Rev. Lett. 91, 210402 (2003) [4 pages]

Formation of Quantum-Degenerate Sodium Molecules

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K. Xu, T. Mukaiyama, J. R. Abo-Shaeer, J. K. Chin, D. E. Miller, and W. Ketterle
Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA

Received 1 October 2003; published 21 November 2003

Ultracold sodium molecules were produced from an atomic Bose-Einstein condensate by ramping an applied magnetic field across a Feshbach resonance. More than 105 molecules were generated with a conversion efficiency of ∼4%. Using laser light resonant with an atomic transition, the remaining atoms could be selectively removed, preventing fast collisional relaxation of the molecules. Time-of-flight analysis of the pure molecular sample yielded an instantaneous phase-space density greater than 20.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.210402
DOI:
10.1103/PhysRevLett.91.210402
PACS:
03.75.Nt, 32.80.Pj, 33.80.Ps, 34.20.Cf