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  • Optical control of collision dynamics in a metastable neon magneto-optical trap

    Author(s)
    Glover, RD
    Calvert, JE
    Laban, DE
    Sang, RT
    Griffith University Author(s)
    Sang, Robert T.
    Glover, Rohan D.
    Laban, Dane E.
    Calvert, James E.
    Year published
    2011
    Metadata
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    Abstract
    We present results for controlled optical collisions of cold, metastable Ne atoms in a magneto-optical trap. The modification of the ionizing collision rate is demonstrated using a control laser tuned close to the (3s)3P2 to (3p)3D3 cooling transition. The measured ionization spectrum does not contain resonances due to the formation of photoassociated molecules connected to the omega = 5 excited state potential as predicted by Doery et al (1998 Phys. Rev. A 57 3603-20). Instead, we observe a broad unresolvable ionization spectrum that is well described by established theory (Gallagher and Pritchard 1989 Phys. Rev. Lett. ...
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    We present results for controlled optical collisions of cold, metastable Ne atoms in a magneto-optical trap. The modification of the ionizing collision rate is demonstrated using a control laser tuned close to the (3s)3P2 to (3p)3D3 cooling transition. The measured ionization spectrum does not contain resonances due to the formation of photoassociated molecules connected to the omega = 5 excited state potential as predicted by Doery et al (1998 Phys. Rev. A 57 3603-20). Instead, we observe a broad unresolvable ionization spectrum that is well described by established theory (Gallagher and Pritchard 1989 Phys. Rev. Lett. 63 957). In order to induce collisions between pairs of trapped metastables, a control laser is tuned to the red of the transition where we measure a factor of 4 increase in the rate for ionizing collisions. We also investigate the effect of optical shielding by tuning the laser to the blue of the transition and observe a factor of 5 suppression in the ionization rate.
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    Journal Title
    Journal of Physics B: Atomic, Molecular and Optical Physics
    Volume
    44
    DOI
    https://doi.org/10.1088/0953-4075/44/24/245202
    Subject
    Atomic and Molecular Physics
    Atomic, Molecular, Nuclear, Particle and Plasma Physics
    Optical Physics
    Theoretical and Computational Chemistry
    Publication URI
    http://hdl.handle.net/10072/42670
    Collection
    • Journal articles

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