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Anisotropy of optical suppression in photoassociative ionization collisions within a slow, collimated sodium atom beam

  • C.-C. Tsao
  • Y. Wang
  • R. Napolitano
  • J. Weiner

Abstract:

We report the observation of polarization anisotropy in the optical suppression of photoassociative ionization (PAI) collisions. Binary collisions occur within a tightly collimated and optically cooled velocity group of a single sodium beam. A laser beam, blue-detuned with respect to the atomic resonance transition, crosses the atomic beam and suppresses the PAI rate. We measure this suppression as a function of intensity and electric field vector aligned parallel or perpendicular to the atomic beam axis. Quantum close-coupling and multichannel curve-crossing calculations of model systems yield insight into the nature of the anisotropy and are in reasonable agreement with the measurements.

PACS. 32.80.Pj Optical cooling of atoms; trapping - 34.50.Rk Laser-modified scattering and reactions 

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Copyright information

© EDP Sciences, Springer-Verlag 1998

Authors and Affiliations

  • C.-C. Tsao
    • 1
  • Y. Wang
    • 1
  • R. Napolitano
    • 1
  • J. Weiner
    • 1
  1. 1.Laboratory for Atomic, Molecular, and Optical Science and Engineering, University of Maryland, College Park, Maryland 20742, USAUS

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