Ultracold photoassociative ionization collisions in a magneto-optical trap: The optical-field-intensity dependence in a radiatively dissipative environment

V. Bagnato, L. Marcassa, Y. Wang, J. Weiner, P. S. Julienne, Y. B. Band

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18 Scopus citations

Abstract

We report here measurements of two-body associative-ionization collisions between sodium atoms confined in a magneto-optic trap. These collisions represent a kind of ''open'' or dissipative collision for which the energy of the atom plus applied light field subsystem need not be conserved due to spontaneous-emission coupling to the vacuum modes of the radiation field. The experiment measures the photoassociative-ionization-rate constant as a function of the optical field intensity from about 40 to 260 mW cm-2. These results are in reasonable agreement with the predictions of an optical-Bloch-equation theory [Y. B. Band and P. S. Julienne, Phys. Rev. A 46, 330 (1992)], but differ strongly from the predictions of a local-equilibrium theory [A. Gallagher, Phys. Rev. A 44, 4249 (1991)].

Original languageEnglish
Pages (from-to)R2523-R2526
JournalPhysical Review A
Volume48
Issue number4
DOIs
StatePublished - 1 Jan 1993

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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