Formation of cold Cs ground state molecules through photoassociation in the pure long-range state

Year: 2000

Authors: Comparat D., Drag C., Laburthe Tolra B., Fioretti A., Pillet P., Crubellier A., Dulieu O., Masnou-Seeuws F.

Autors Affiliation: Laboratoire Aimé Cotton, University of Paris-Sud., CNRS II, bâtiment 505, 91405 Orsay, France

Abstract: We report on the formation of translationally cold Cs-2 ground state molecules through photoassociation in the 1(u) attractive molecular state below the 6s(1/2)+6p(3/2) dissociation limit. The cold molecules are obtained after spontaneous decay of photoassociated molecules in a MOT and in a dark SPOT. We also used polarized atoms, in the f = 3, m(f) = +3 Zeeman ground state. Purely asymptotic and adiabatic calculations including hyperfine interaction and rotation are in excellent agreement with observed structures. As expected, the 1(u) state is actually a pure long-range state, consisting of paired atoms, uniquely linked by the first terms of the multipole expansion of the electrostatic interaction. A temperature of 20(-5)(+15) mu K has been measured for the molecular cloud.

Journal/Review: EUROPEAN PHYSICAL JOURNAL D

Volume: 11 (1)      Pages from: 59  to: 71

KeyWords: Optical cooling of atoms; Trapping; Molecular spectra; Interatomic and intermolecular potentials and forces; Ccollisions
DOI: 10.1007/s100530070105

Citations: 67
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