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Measurement of Cs-Cs Elastic Scattering at T = 30 μK

C. R. Monroe

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

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

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E. A. Cornell

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

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

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C. A. Sackett

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

Department of Physics, 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

Department of Physics, 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

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https://doi.org/10.1142/9789812813787_0044Cited by:0 (Source: Crossref)

Abstract:

We have measured the elastic collision cross section for spin polarized atomic cesium. Neutral cesium atoms are optically cooled, then loaded into a dc magnetic trap. We infer the scattering rate from the rate at which anisotropies in the initial energy distribution are observed to relax. The cross section for F = 3, m_F = − 3 on F = 3, m_F = − 3 is 1.5(4) × 10⁻¹² cm², and is independent of temperature from 30 to 250 μK, This determination clarifies the technical requirements for attaining Bose-Einstein condensation in a magnetically trapped Cs vapor. We also study heating due to glancing collisions with 300 K background Cs atoms.

PACS: 34.40.+n, 05.30.Jp, 32.80.Pj, 34.50.–s

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Measurement of Cs-Cs Elastic Scattering at T = 30 μK

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