Cold rubidium molecule formation through photoassociation: a spectroscopic study of the 0(g)(-) long-range state of Rb-87(2)

A. Fioretti, C. Amiot, C. M. Dion, O. Dulieu, M. Mazzoni, G. Smirne, C. Gabbanini

    Research output: Contribution to journalArticlepeer-review

    51 Citations (Scopus)


    We report the detailed analysis of translationally cold rubidium molecule formation through photoassociation. Cold molecules are formed after spontaneous decay of photoexcited molecules from a laser cooled atomic sample, and are detected by selective mass spectroscopy after two-photon ionization into Rb-2(+) ions. A spectroscopic study of the 0(g)(-)(5S + 5P(3/2)) pure long-range state of Rb-87(2) is performed by detecting the ion yield as a function of the photoassociation laser frequency the spectral data are theoretically analyzed within the semiclassical RKR approach. Molecular ionization is resonantly enhanced through either the 2(3) Pi (g), or the 2(3) Sigma (+)(g) intermediate molecular states. Some vibrational levels of the latter electronic state are observed and assigned here for the first time. Finally, cold molecules formation rates are calculated and compared to the experimentally measured ones, and the vibrational distribution of the formed molecules in the a(3) Sigma (+)(u) ground triplet state is discussed.
    Original languageEnglish
    Pages (from-to)189-198
    Number of pages10
    JournalEuropean Physical Journal D
    Issue number2
    Publication statusPublished - 2001


    • Optical cooling of atoms
    • Trapping
    • Laser-modied scattering and reactions

    Cite this