Hannover 2010 – scientific programme
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A: Fachverband Atomphysik
A 1: COLTRIMS-based Collision Physics (exchanged with A4)
A 1.3: Invited Talk
Monday, March 8, 2010, 15:00–15:30, F 303
Breaking the longest bond – Photoionization of the Helium Dimer — •R. Dörner1, T. Havermeier1, H. Sann1, T. Jahnke1, M. Schöffler1, J. Titze1, N. Neumann1, K. Kreidi1, R. Wallauer1, S. Voss1, L. Ph. H. Schmidt1, H. Schmidt-Böcking1, R. Grisenti1 und W. Schöllkopf2 — 1J. W. Goethe-Universität Frankfurt, Max von Laue Str. 1, D-60438 Frankfurt am Main — 2Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin
The Helium Dimer He2 is an extreme quantum system, bound with only 100neV of binding energy and a widely smeared wavefunction, showing a mean internuclear distance of 52 Angstrom. We study the photoionization of this quantum system by means of the COLTRIMS technique. We find surprisingly efficient mechanisms by which a single photon can lead to ejection of two electrons, one from each of the distant atom of the dimer.