Resonant Magnetic Field Control of Elastic Scattering in Cold R85b

J. L. Roberts, N. R. Claussen, James P. Burke, Jr., Chris H. Greene, E. A. Cornell, and C. E. Wieman
Phys. Rev. Lett. 81, 5109 – Published 7 December 1998
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Abstract

A magnetic field-dependent Feshbach resonance has been observed in the elastic scattering collision rate between atoms in the F=2,M=2 state of 85Rb. Changing the magnetic field by several Gauss caused the collision rate to vary by a factor of 104, and the sign of the scattering length could be reversed. The resonance peak is at 155.2(4) G and its width is 11.6(5) G. From these results we extract much improved values for the three quantities that characterize the interaction potential: The van der Waals coefficient C6, the singlet scattering length aS, and the triplet scattering length aT.

  • Received 29 July 1998

DOI:https://doi.org/10.1103/PhysRevLett.81.5109

©1998 American Physical Society

Authors & Affiliations

J. L. Roberts, N. R. Claussen, James P. Burke, Jr., Chris H. Greene, E. A. Cornell*, and C. E. Wieman

  • JILA and the Department of Physics, University of Colorado, Boulder, Colorado 80309-0440

  • *Quantum Physics Division, National Institute of Standards and Technology, Gaithersburg, MD 20899.

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Issue

Vol. 81, Iss. 23 — 7 December 1998

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