title: Imaging of s and d partial-wave interference in quantum scattering of identical bosonic atoms.
abstract: We report on the direct imaging of s and d partial-wave interference in cold collisions of atoms. Two ultracold clouds of 87Rb atoms were accelerated by magnetic fields to collide at energies near a d-wave shape resonance. The resulting halos of scattered particles were imaged using laser absorption. By scanning across the resonance we observed a marked evolution of the scattering patterns due to the energy dependent phase shifts for the interfering s and d waves. Since only two partial-wave states are involved in the collision process the scattering yield and angular distributions have a simple interpretation in terms of a theoretical model.
authors.affiliation: Department of Physics, University of Otago, Dunedin, New Zealand.
authors.forename: Nicholas R
authors.initials: NR
authors.lastname: Thomas
authors.forename: Niels
authors.initials: N
authors.lastname: Kjaergaard
authors.forename: Paul S
authors.initials: PS
authors.lastname: Julienne
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Wilson