Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improved Characterization of Elastic Scattering Near a Feshbach
  Resonance in 85Rb   We report extentions 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) gauss) and its width (11.0(4) gauss),
improvements in our techniques now allow the measurement of the absolute size
of the elastic scattering rate. This provides a new measure of the s-wave
scasttering length as a function of magnetic field near the Feshbach resonance
and contrains the Rb-Rb interaction potential.

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The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: math
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The categories of this paper are: q-alg