title: Interisotope determination of ultracold rubidium interactions from three high-precision experiments.
abstract: Combining the measured binding energies of four of the most weakly bound rovibrational levels of the 87Rb2 molecule with results of two other recent high-precision experiments, we obtain exceptionally strong constraints on the atomic interaction parameters in a highly model independent analysis. The comparison of (85)Rb and (87)Rb data, where the two isotopes are related by a mass scaling procedure, plays a crucial role. We predict scattering lengths, clock shifts, and Feshbach resonances with an unprecedented level of accuracy. Two of the Feshbach resonances occur at easily accessible magnetic fields in mixed-spin channels. One is related to a d-wave shape resonance.
authors.affiliation: Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: E G M
authors.initials: EG
authors.lastname: van Kempen
authors.forename: S J J M F
authors.initials: SJ
authors.lastname: Kokkelmans
authors.forename: D J
authors.initials: DJ
authors.lastname: Heinzen
authors.forename: B J
authors.initials: BJ
authors.lastname: Verhaar