2000/03/26 by H. Engler, T. Weber, M. Mudrich +4 · 2 citations
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #physics.atom-ph
paper · pdf · doi:10.1103/physreva.62.031402
5 pages, 3 figures
arxiv created 2000/03/26 · openalex publication_date 2000/08/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We have trapped cesium atoms over many minutes in the focus of a CO2-laser beam employing an extremely simple laser system. Collisional properties of the unpolarized atoms in their electronic ground state are investigated. Inelastic binary collisions changing the hyperfine state lead to trap loss, which is quantitatively analyzed. Elastic collisions result in evaporative cooling of the trapped gas from 25 \ensuremathμK to 10 \ensuremathμK over a time scale of about 150 s.