Phys. Rev. Lett. 94, 120402 (2005) [4 pages]Production Efficiency of Ultracold Feshbach Molecules in Bosonic and Fermionic SystemsReceived 17 November 2004; published 30 March 2005 We investigate the production efficiency of ultracold molecules in bosonic 85Rb and fermionic 40K when the magnetic field is swept across a Feshbach resonance. For adiabatic sweeps of the magnetic field, our novel model shows that the conversion efficiency of both species is solely determined by the phase space density of the atomic cloud, in contrast with a number of theoretical predictions. In the nonadiabatic regime our measurements of the 85Rb molecule conversion efficiency follow a Landau-Zener model. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.120402
DOI:
10.1103/PhysRevLett.94.120402
PACS:
05.30.Jp, 03.75.Ss, 05.30.Fk, 36.90.+f
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