Y. N. Martinez de Escobar

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.

Two-photon photoassociative spectroscopy of ultracold 88Sr

We present results from two-photon photoassociative spectroscopy of the least-bound vibrational level of the X

Repumping and spectroscopy of laser-cooled Sr atoms using the (5s5p)3P2–(5s4d)3D2 transition

^1\Sigma_g^+

Inelastic and elastic collision rates for triplet states of ultracold strontium

state of the

Numerical modeling of collisional dynamics of Sr in an optical dipole trap

^{88}

Bose-Einstein condensation of Sr 88 through sympathetic cooling with Sr 87

Sr

Bose-Einstein Condensation of

_2

^{88}

dimer. Measurement of the binding energy allows us to determine the s-wave scattering length,

Sr Through Sympathetic Cooling with

a_{88}=-1.4(6) a_0

^{87}

. For the intermediate state, we use a bound level on the metastable