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Proceedings Paper

Zero kinetic energy photoelectron spectroscopy and femtosecond dynamics of the cluster Na3
Author(s): R. Thalweiser; S. Vogler; Gustav Gerber
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Paper Abstract

Zero kinetic energy (ZEKE) photoelectron spectroscopy has been employed to study the spectroscopy and the geometry of the sodium cluster Na3+ with nanosecond tunable dye lasers. The fully resolved cation vibrational spectra prove the equilateral (D3h) geometry of Na3+. Due to the high resolution of the ZEKE method we derived a much improved value for the ionization potential of Na3 of 31,363 +/- 5 cm-1, which is about 300 cm-1 lower than previous values. The real- time dynamics of two photon ionization and fragmentation of Na3 has been studied applying femtosecond pump-probe techniques in combination with ion- and ZEKE photoelectron spectroscopy. Three dimensional vibrational wave packet motions in the excited state B and in the ground state X as well as pseudorotational wave packet motion in the B-state have been observed. Time resolved fragmentation studies show ultrafast picosecond decays of most of the excited states of Na3.

Paper Details

Date Published: 22 April 1993
PDF: 11 pages
Proc. SPIE 1858, Laser Techniques for State-Selected and State-to-State Chemistry, (22 April 1993); doi: 10.1117/12.143086
Show Author Affiliations
R. Thalweiser, Univ. Freiburg (Germany)
S. Vogler, Univ. Freiburg (Germany)
Gustav Gerber, Univ. Freiburg (Germany)

Published in SPIE Proceedings Vol. 1858:
Laser Techniques for State-Selected and State-to-State Chemistry
Cheuk Yiu Ng, Editor(s)

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