Darmstadt 2008 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 22: Collision processes and energy transfer II (jointly with MO)
A 22.1: Gruppenbericht
Donnerstag, 13. März 2008, 11:00–11:30, 3F
High-resolution electron collision spectroscopy of the elementary second-row molecular ions — •O. Novotny1, M.H. Berg1, D. Bing1, H. Buhr1,2, H. Fadil1, M. Froese1, J. Hoffmann1, A.S. Jaroshevich3, B. Jordan-Thaden1, C. Krantz1, M. Lange1, M. Lestinsky1, M.B. Mendes1, S. Novotny1, D.A. Orlov1, A. Petrignani1, S. Reinhardt1, T. Sorg1, and A. Wolf1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany — 2Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100, Israel — 3Institute of Semiconductor Physics, 630090 Novosibirsk, Russia
The fundamental molecules composed of atoms from the second row of the periodic table (C,N,O,F) have a rich structure of excited potential curves that can be probed at high energy resolution by observing fragmentation processes following collisions with quasi-monochromatic electrons. Experiments of this type are performed in merged electron and ion beams at the ion storage ring TSR in Heidelberg. Using a cold, photocathode-produced electron beam, experiments on the system CF+ yield rich structure in the collision energy dependence of both dissociative recombination and excitation. Moreover, the final atomic levels reached in the fragmentation can be observed, shedding light on their correlation to the collisionally populated excited molecular potentials.