Resonant Two-Step Ionization of rb and cs Atoms on Helium Nanodroplets

Details Resonant Two-Step Ionization of rb and cs Atoms on Helium Nanodroplets Resonant Two-Step Ionization of rb and cs Atoms on Helium Nanodroplets

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mss..confefe03l&link_type=abstract

"International Symposium On Molecular Spectroscopy, 66th Meeting, Held 20-24 June, 2011 at Ohio State University. http://molspec

Physics

Matrix/Condensedphase

Scientific paper

Rb and Cs atoms on the surface of helium nanodroplets are ionized by applying a monomer selective resonant two-step ionization scheme. We show that in addition to Rb also Cs atoms stay bound on the surface of helium nanodroplets when excited into the N2P1/2 (Rb: n = 5, Cs: n = 6) state. Rb atoms are selectively excited either to the 52P1/2 or to the 52P3/2 state and ionized with a pulsed laser. The formation of stable Rb+--He_n (n < 20) complexes is observed by ionization via the 52P3/2 state. Ions with masses of up to several thousand amu have been monitored, which can be explained by an immersion of the single Rb (Cs) ions into the helium nanodroplet upon ionization via the 52P1/2 (62P1/2) state.
G. Auböck, J. Nagl, C. Callegari, and W.E. Ernst, Phys. Rev. Lett. 101, 035301 (2008)
M. Theisen, F. Lackner, and W.E. Ernst, Phys. Chem. Chem. Phys., 45, 14861-14863 (2010).

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