[Historical report created from ArXiv.org submission:]

"We report on the achievement of simultaneous quantum degeneracy in a mixed gas of fermionic ⁴⁰K and bosonic ⁸⁷Rb. Potassium is cooled to 0.3 times the Fermi temperature by means of an efficient thermalization with evaporatively cooled rubidium. Direct measurement of the collisional cross-section confirms a large interspecies attraction. This interaction is shown to affect the expansion of the Bose-Einstein condensate released form the magnetic trap, where it is immersed in the Fermi sea."

Published in Physical Review Letters

Updated: 27 Jul 2005

[Received 1 May 2002; published 23 September 2002] Phys. Rev. Lett. 89, 150403 (2002)