Osnabrück 2002 – scientific programme
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A: Atomphysik
A 18: Poster II
A 18.9: Poster
Thursday, March 7, 2002, 17:30–19:30, Schloss
Experimental Evidence for Electron Repulsion in Multiphoton Double Ionization — •Matthias Weckenbrock1, Mirko Hattass1, Achim Czasch1, Ottmar Jagutzki1, Lothar Schmidt1, Thorsten Weber1, Reinhard Dörner1, Hartmut Roskos2, Torsten Löffler2, Marc Thomson2, and Horst Schmidt-Böcking1 — 1Institut für Kernphysik, Uni Frankfurt am Main — 2Physikalisches Institut, Uni Frankfurt am Main
We have measured the coincident momenta of both electrons emitted in argon double ionization at 780 nm and 4.7× 1014W/cm2. For electrons which are emitted with very small momentum transverse to the electric field, we find that the two electrons have very unequal momentum. This is in contrast to the situation for larger transverse momenta for which most electrons are found with similar momentum. We interpret this observation as a manifestation of electron repulsion. We also identify contributions from electron impact excitation.