Degenerate Fermi gas of (87)Sr.
We report quantum degeneracy in a gas of ultracold fermionic (87)Sr 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) ∼0.5.
DeSalvo
B J
BJ
Department of Physics and Astronomy, Rice University, Houston, Texas, 77251, USA.
Yan
M
M
Mickelson
P G
PG
Martinez de Escobar
Y N
YN
Killian
T C
TC