Details

Autor(en) / Beteiligte

• Fechner, L
• Grner, B
• Sieg, A
• Callegari, C
• Ancilotto, F
• Stienkemeier, F
• Mudrich, M

Titel

Photoionization and imaging spectroscopy of rubidium atoms attached to helium nanodroplets

Ist Teil von

• Physical chemistry chemical physics : PCCP, 2012-03, Vol.14 (11), p.3843-3851

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. We find high yields of RbHe and RbHe 2 exciplexes when exciting to the 4D and 6P bands but not at the 6S band, in accord with a direct formation of exciplexes in binding RbHe pair potentials. 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. Optical excitation of Rb atoms attached to the surface of He nanodroplets entails the desorption and, depending on the symmetry of the pseudodiatomic state, the formation of exiplex molecules.