Sympathetic cooling of bosonic and fermionic lithium gases towards quantum degeneracy
Sympathetic cooling of bosonic and fermionic lithium gases towards quantum degeneracy
Sympathetic cooling of two atomic isotopes is experimentally investigated. Using forced evaporation of a bosonic ${}^{7}\mathrm{Li}$ gas in a magnetic trap, a sample of $1.3\ifmmode\times\else\texttimes\fi{}{10}^{5}$ ${}^{6}\mathrm{Li}$ fermions has been sympathetically cooled to $9(3) \ensuremath{\mu}\mathrm{K},$ corresponding to $2.2(0.8)$ times the Fermi temperature. The measured rate constant for two-body inelastic collisions of …