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 mom...

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Veröffentlicht in:	Physical review letters 2010-07, Vol.105 (3), p.030402-030402
Hauptverfasser:	DeSalvo, B J, Yan, M, Mickelson, P G, Martinez de Escobar, Y N, Killian, T C
Format:	Artikel
Sprache:	eng
Schlagworte:	ALKALINE EARTH ISOTOPES ANGULAR MOMENTUM BETA DECAY RADIOISOTOPES CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COOLING DIPOLES EFFICIENCY ELECTRON CAPTURE RADIOISOTOPES EVAPORATION EVAPORATIVE COOLING EVEN-ODD NUCLEI FERMI GAS HOURS LIVING RADIOISOTOPES INTERMEDIATE MASS NUCLEI ISOMERIC TRANSITION ISOTOPES ISOTOPES MULTIPOLES NUCLEI PARTICLE PROPERTIES PHASE TRANSFORMATIONS RADIOISOTOPES SPIN STABLE ISOTOPES STRONTIUM 87 STRONTIUM ISOTOPES TIME-OF-FLIGHT METHOD TRAPS
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Zusammenfassung:	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.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PHYSREVLETT.105.030402