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s-wave elastic collisions between cold ground-state ⁸⁷Rb atoms

N. R. Newbury

Joint Institute for Laboratory Astrophysics, University of Colorado, 440 UCB, Boulder, CO 80309-0440, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

Physics Department, University of Colorado, Boulder, Colorado 80309-0440, USA

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C. J. Myatt

Joint Institute for Laboratory Astrophysics, University of Colorado, 440 UCB, Boulder, CO 80309-0440, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

Physics Department, University of Colorado, Boulder, Colorado 80309-0440, USA

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C. E. Wieman

Joint Institute for Laboratory Astrophysics, University of Colorado, 440 UCB, Boulder, CO 80309-0440, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

Physics Department, University of Colorado, Boulder, Colorado 80309-0440, USA

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https://doi.org/10.1142/9789812813787_0052Cited by:0 (Source: Crossref)

Abstract:

We have measured the elastic-scattering cross section of ⁸⁷Rb atoms in the |F = 1, m_F. = − 1〉 ground state at 25 μK. The cross section is almost purely s wave at these temperatures and has a value of (5.4 ± 1.3) × 10⁻¹² cm². We have searched for the predicted Feshbach-type resonances in the elastic cross section [Ticsinga et al., Phys. Rev. A 46, 1167 (1992)] as a function of magnetic field. There are no resonances with a magnetic-field width ≥ 2 G over a magnetic-field range of 15–540 G.

PACS: 34.50.−s, 32.80.Pj, 05.30.Jp

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s-wave elastic collisions between cold ground-state ⁸⁷Rb atoms