Optical trapping of cold fermionic potassium for collisional studies
Year: 2001
Authors: Roati G., Jastrzebski W., Simoni A., Modugno G., Inguscio M.
Autors Affiliation: Univ Florence, LENS, INFM, I-50125 Florence, Italy; Univ Florence, Dipartimento Fis, I-50125 Florence, Italy; Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland.
Abstract: We report on trapping of fermionic K-40 atoms in a red-detuned standing-wave optical trap, loaded from a magneto-optical trap. Typically, unpolarized samples of 10(6) atoms are loaded at a density of 10(12) cm(-3) and a temperature of 65 muK, and trapped for more than 1 s. The optical trap appears to be the proper environment for performing collisional measurements on the cold atomic sample. In particular, we measure the spherically averaged elastic collision rate by detecting the rethermalization following an intentional parametric heating of the atoms. We also measure spherically averaged inelastic two-body collision rates for atoms in the ground hyperfine states, through detection of trap losses.
Journal/Review: PHYSICAL REVIEW A
Volume: 63 (5) Pages from: 52709-1 to: 52709-7
KeyWords: Feshbach Resonances; Scattering Lengths; Spectroscopy; K-39DOI: 10.1103/PhysRevA.63.052709Citations: 11data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-17References taken from IsiWeb of Knowledge: (subscribers only)