Formation of ultracold metastable RbCs molecules by short-range photoassociation

Details Formation of ultracold metastable RbCs molecules by short-range photoassociation Formation of ultracold metastable RbCs molecules by short-range photoassociation

2011-07-04

arxiv.org/abs/1107.0547v1

Physics

Atomic Physics

Scientific paper

Ultracold metastable RbCs molecules are observed in a double species MOT through photoassociation near the Rb(5S$_{1/2}$)+Cs(6P$_{3/2}$) dissociation limit followed by radiative stabilization. The molecules are formed in their lowest triplet electronic state and are detected by resonant enhanced two-photon ionization through the previously unobserved $(3)^{3}\Pi \leftarrow a^{3}\Sigma^{+}$ band. The large rotational structure of the observed photoassociation lines is assigned to the lowest vibrational levels of the $0^+,0^-$ excited states correlated to the Rb(5P$_{1/2}$)+Cs(6S$_{1/2}$) dissociation limit. This demonstrates the possibility to induce direct photoassociation in heteronuclear alkali-metal molecules at short internuclear distance, as pointed out in [J. Deiglmayr \textit{et al.}, Phys. Rev. Lett. \textbf{101}, 13304 (2008)].

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