Ultracold collisions of Li + Na atoms in variable magnetic field

We are studying collisional properties of $^{6,7}$Li + $^{23}$Na in the presence of a magnetic field at ultracold temperatures. Our main goal is an accurate characterization of Feshbach resonances using coupled-channel calculation. Feshbach resonances can be used for production of ultracold heteronuclear molecules in the low vibrational levels. Depending on the Li isotope, formed polar molecules are either fermionic or bosonic, which, in turn allows the study of degenerate Bose-Fermi mixtures with adjustable interactions, or the Bose-Einstein condensate of polar molecules.