Osnabrück 2002 – wissenschaftliches Programm

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A: Atomphysik

A 18: Poster II

A 18.9: Poster

Donnerstag, 7. März 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.