Document Type

Article

Publication Date

Summer 7-5-2001

Publication Title

Physical Review A

ISSN

1050-2947

Volume

64

Issue

2

First Page

024702-1

Last Page

024702-3

DOI

10.1103/PhysRevA.64.024702

Abstract

We report extensions and corrections to the measurement of the Feshbach resonance in 85Rb cold atom collisions reported earlier [J. L. Roberts et al., Phys. Rev. Lett. 81, 5109 (1998)]. In addition to a better determination of the position of the resonance peak [154.9(4) G] and its width [11.0(4) G], improvements in our techniques now allow the measurement of the absolute size of the elastic-scattering rate. This provides a measure of the s-wave scattering length as a function of magnetic field near the Feshbach resonance and constrains the Rb-Rb interaction potential.

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