Femtosecond pump-probe experiments on non-stoichiometric sodium-fluoride clusters: I. First direct observation of periodical structural changes in Na2F

Lupulescu, C.; Vajda, Š.; Lindinger, A.; Merli, A.; Wöste, L.
June 2003
European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Jun2003, Vol. 24 Issue 1-3, p173
Academic Journal
In this paper we present two-color pump and probe spectroscopy on Na2F, the smallest of the non-stoichiometric sodium-fluoride clusters (NanFn-1), in molecular beams by employing femtosecond laser pulses. The molecules were pumped into the first excited state by one photonic transition and consecutively ionized from there by the second photon. We resolved the wavepacket oscillatory motion involving periodical structural rearrangements in the first excited state of Na2F with a period of ∼ 185 fs. The time-resolved experiments show that sodium fluoride clusters provide interesting features which can be manipulated in optimal control experiments.


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