FEMTOSECOND VIBRATIONAL DYNAMICS OF POTASSIUM DIMER

S. Rutz, E. Schreiber and L. Wöste
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S. Rutz: Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, 14195 Berlin, Germany
E. Schreiber: Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, 14195 Berlin, Germany
L. Wöste: Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, 14195 Berlin, Germany

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 475-477

Abstract: Combining the femtosecond pump & probe technique with isotope-selective detection, the dynamics of the${}^{39,41} {\rm K}_2 (A)^1 \sum_u^+$state could be investigated. The three-photon-ionization (3PI) signal was recorded over a delay time range of 220 ps. A strong oscillation around the zero-of-time dephases within 10 ps. Fourier analysis of the spectrum yields a group of frequencies settled between 63 and 68 cm−1which can be assigned to the energy spacings in theAstate being excited by a 90-fs laser pulse. The corresponding vibrational periods could be estimated to lie between 499 and 520 fs.

Date: 1996
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DOI: 10.1142/S0218625X96000851

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