Measurement of inelastic losses in a sample of ultracold {sup 85}Rb
- Australian Centre for Quantum Atom Optics, Australian National University, ACT 0200 (Australia)
We report on measurements of inelastic loss processes in ultracold {sup 85}Rb |F=2> atoms. Our apparatus creates ultracold {sup 85}Rb clouds by sympathetic cooling with a {sup 87}Rb reservoir in a quadrupole-Ioffe magnetic trap and subsequently in a weak, large-volume optical dipole trap. We demonstrate strong sympathetic cooling of {sup 85}Rb in the magnetic trap, increasing its phase-space density by three orders of magnitude with no detectable loss in number. Ultracold samples created in this way are used to observe the variation of inelastic loss in {sup 85}Rb |F=2, m{sub F}=-2> clouds as a function of magnetic field near the 155-G Feshbach resonance and to measure the decay due to inelastic losses in all five Zeeman sublevels of the F=2 manifold, finding a particularly high three-body recombination rate in the lowest energy state. We have also observed and characterized a previously unobserved loss feature at 219.9(1) G with a width of 0.28(6) G, which we associate with a narrow Feshbach resonance predicted by theory.
- OSTI ID:
- 21388738
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CLOUDS
COOLING
DENSITY
DIMENSIONS
DIPOLES
EQUIPMENT
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LOSSES
MAGNETIC FIELDS
MANY-BODY PROBLEM
MATHEMATICAL SPACE
MULTIPOLES
NANOSECONDS LIVING RADIOISOTOPES
NUCLEI
ODD-EVEN NUCLEI
PHASE SPACE
PHYSICAL PROPERTIES
RADIOISOTOPES
RESONANCE
RUBIDIUM 85
RUBIDIUM 87
RUBIDIUM ISOTOPES
SPACE
STABLE ISOTOPES
THREE-BODY PROBLEM
TRAPS
WIDTH
YEARS LIVING RADIOISOTOPES
ZEEMAN EFFECT