Degenerate Fermi Gas of 87Sr

Abstract

We report quantum degeneracy in a gas of ultracold fermionic Sr87 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+0.05−0.06. 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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DeSalvo, B.J., Yan, M., Mickelson, P.G., et al.. "Degenerate Fermi Gas of 87Sr." Physical Review Letters, 105, (2010) 030402. http://dx.doi.org/10.1103/PhysRevLett.105.030402.

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