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Photoassociative spectroscopy of the \(\) long-range state

  • A. Fioretti
  • D. Comparat
  • C. Drag
  • C. Amiot
  • O. Dulieu
  • F. Masnou-Seeuws
  • P. Pillet

Abstract:

The photoassociative spectroscopy of the Cs20g - long-range molecular state dissociating into the \(\)asymptote is performed, using cold cesium atoms in a vapor-cell magneto-optical trap (MOT). Vibrational levels from v=0 to v=132 are identified, and their rotational structure is well resolved up J=8 for levels below v=74. These data are analyzed in terms of the Rydberg-Klein-Rees (RKR) procedure, and correspond to 99.6% of an effective potential curve with a minimum at \(\)Å and a \(\) cm-1 depth. Both ab initio calculations and simple model estimations predict a double-well structure for this potential curve, which cannot be reproduced presently by the RKR approach but which is confirmed by the presence of giant structures in the spectrum. The 1u(\(\))long-range state is also observed for the first time in Cs2.

PACS. 32.80.Pj Optical cooling of atoms; trapping - 33.20.-t Molecular spectra - 34.20.-b Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions 

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Copyright information

© EDP Sciences, Springer-Verlag 1999

Authors and Affiliations

  • A. Fioretti
    • 1
  • D. Comparat
    • 1
  • C. Drag
    • 1
  • C. Amiot
    • 1
  • O. Dulieu
    • 1
  • F. Masnou-Seeuws
    • 1
  • P. Pillet
    • 1
  1. 1.Laboratoire Aimé Cotton (CNRS II), Université Paris-Sud, Bâtiment 505, 91405 Orsay Cedex, FranceFR

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