Sympathetic cooling and collisional properties of a Rb-Cs mixture

Year: 2005

Authors: Anderlini M., Courtade E., Cristiani M., Cossart D., Ciampini D., Sias C., Morsch O., Arimondo E.

Autors Affiliation: INFM, Dipartimento di Fisica E. Fermi, Università di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy

Abstract: We report on measurements of the collisional properties of a mixture of Cs-133 and Rb-87 atoms in a magnetic trap at mu K temperatures. By selectively evaporating the Rb atoms using a radio-frequency field, we achieved sympathetic cooling of Cs down to a few mu K. The interspecies collisional cross section was determined through rethermalization measurements, leading to good agreement with a theoretical prediction of 595a(0) for the triplet s-wave scattering length for Rb in the parallel to F=2,m(F)=2 > and Cs in the parallel to F=4,m(F)=4 > magnetic states. We briefly speculate on the prospects for reaching the Bose-Einstein condensation of Cs inside a magnetic trap through sympathetic cooling.

Journal/Review: PHYSICAL REVIEW A

Volume: 71 (6)      Pages from: 061401-1  to: 061401-4

KeyWords: Cold atoms; Atomic collisions;
DOI: 10.1103/PhysRevA.71.061401

Citations: 43
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