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Article Dans Une Revue Physical Review Letters Année : 2003

Giant helium dimers produced by photoassociation of ultracold metastable atoms

Résumé

We produce giant helium dimers by photoassociation of metastable helium atoms in a magnetically trapped, ultracold cloud. The photoassociation laser is detuned red of the atomic $2^3S_1 - 2^3P_0 $ line and produces strong heating of the sample when resonant with molecular bound states. The temperature of the cloud serves as an indicator of the molecular spectrum. We report good agreement between our spectroscopic measurements and our calculations of the five bound states belonging to a $0_u^+$ purely long-range potential well. These previously unobserved states have classical inner turning points of about 150 $a_0$ and outer turning points as large as 1150 $a_0$.

Dates et versions

hal-00002376 , version 1 (28-07-2004)

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Jérémie Léonard, M. Walhout, A.P. Mosk, T. Mueller, Michèle Leduc, et al.. Giant helium dimers produced by photoassociation of ultracold metastable atoms. Physical Review Letters, 2003, 91, pp.073203. ⟨10.1103/PhysRevLett.91.073203⟩. ⟨hal-00002376⟩
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