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A: Atomphysik

A 10: Poster I: Wechselwirkung mit Elektronen und Ionen

A 10.6: Poster

Dienstag, 14. März 2006, 16:30–18:30, Labsaal

Differential Cross Sections for Single and Multiple Ionization in 3.6 AMeV Cr⁷⁺ and Cr²⁰⁺ + Ar Collisions — •M. Nofal^1,2, S Hagmann^3,2, C. Kozhuharov², R. Moshammer¹, and N. Lineva² — ¹Max Planck Inst. f. Kernphysik, Heidelberg — ²GSI-Darmstadt — ³Inst. f. Kernphysik, Univ. Frankfurt

We have investigated single and multiple ionization of Ar using 3.6AMeV Cr⁷⁺ and Cr²⁰⁺ beams from the UNILAC. The perturbation strength characterized by the Sommerfeld parameter q/v varied between 0.6 and 1.7. Electrons and recoil ions emitted in the collision were momentum analyzed using a reaction microscope. We present differential cross sections as a function of electron and recoil longitudinal momentum for a number of electron multiplicities. We compare data with cross sections [1] derived for Ar ionized with strong perturbations q/v=4.4.

[1] R. Moshammer et al Phys. Rev. Lett. 83(4721) 1999