Abstract
We demonstrate a juggling atomic fountain by launching two laser-cooled balls of atoms in rapid succession. The atoms collide near the top of the fountain and, by varying the delay between launches, we scan the collision energy from 19 to . We measure the differential scattering cross section and isolate the contributions from different partial waves including their interferences. We observe the -wave energy dependence and the -wave scattering threshold. We infer a triplet -wave scattering length of and a wave of for .
- Received 19 August 1998
DOI:https://doi.org/10.1103/PhysRevLett.81.5780
©1998 American Physical Society