Imaging spectroscopy of rubidium atoms attached to helium nanodroplets

Details Imaging spectroscopy of rubidium atoms attached to helium nanodroplets Imaging spectroscopy of rubidium atoms attached to helium nanodroplets

2011-09-11

arxiv.org/abs/1109.2298v1

Physics

Atomic and Molecular Clusters

Scientific paper

Highly excited states of rubidium (Rb) atoms attached to helium (He) nanodroplets are studied by two-photon ionization spectroscopy in combination with electron and ion imaging. Photoion spectra and angular distributions are in good agreement with a pseudodiatomic model for the RbHe_N complex. Repulsive interactions in the excited states entail fast dissociation followed by ionization of free Rb atoms as well as of RbHe and RbHe_2 exciplexes. Nonresonant excitation generates Rb atoms in low-lying electronic levels by statistical evaporation-like desorption.

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