Degenerate Fermi Gas of 87Sr
Abstract
We report quantum degeneracy in a gas of ultra-cold fermionic 87Sr 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/TF=0.26+.05-.06. 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/TF 0.5.
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