Frankfurt 2006 – wissenschaftliches Programm
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A: Atomphysik
A 20: Poster II: Atomare Systeme in starken Laserpulsen und statischen Feldern
A 20.10: Poster
Donnerstag, 16. März 2006, 16:30–18:30, Labsaal
Diatomic molecules in intense laser fields — •Stefan Voss1,2, A. S. Alnaser2, X.-M. Tong2, T. Osipov2, B. Ulrich1,2, C. D. Lin2, H. Schmidt-Boecking1, R. Doerner1, and C. L. Cocke2 — 1Institut für Kernphysik, Johann Wolfgang Goethe Universität, Max-von-Laue-Str. 1, D-60438 Frankfurt am Main — 2J.R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS, 66502, U.S.A.
Using cold target recoil ion momentum spectroscopy (COLTRIMS) we measured the full momentum vector of Coulomb exploding H+, N+ or O+ fragments generated by double ionized Hydrogen, Nitrogen or Oxygen respectively with laser peak intensities between 1 and 20· 1014 W/cm2. We show alignment effects of the inter nuclear axis with respect to the polarisation vector due to the outmost orbital electron configuration. Using linear and circularly polarized light, we identify two mechanisms for the production of theses states, rescattering and sequential ionization. By using 8 fs pulses, we observe that the internuclear distance can be frozen during the pulse.