Observation of Feshbach resonances between two different atomic species
  We have observed three Feshbach resonances in collisions between lithium-6 and sodium-23 atoms. The resonances were identified as narrow loss features when the magnetic field was varied. The molecular states causing these resonances have been identified, and additional lithium-sodium resonances are predicted. These resonances will allow the study of degenerate Bose-Fermi mixtures with adjustable interactions, and could be used to generate ultracold heteronuclear molecules. 
C.A. Stan, M.W. Zwierlein, C.H. Schunck, S.M.F. Raupach, and W.   Ketterle