Degenerate Fermi Gas of 87Sr

We report quantum degeneracy in a gas of ultracold fermionic Sr-87 atoms. By evaporatively cooling a mixture of spin states in an optical dipole trap for 10.5 s, we obtain samples well into the degenerate regime with T/T-F = 0.26(-0.06)(+0.05). The main signature of degeneracy is a change in the momentum distribution as measured by time-of-flight imaging, and we also observe a decrease in evaporation efficiency below T/T-F similar to 0.5.