Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 11: Poster I - Collisions with electrons and ions
A 11.11: Poster
Dienstag, 20. März 2007, 16:30–18:30, Poster B
Projectile Continuum Processes in Relativistic Ion-atom Collisions — •Muaffaq Nofal1,3, Siegbert Hagmann2,3, Thomas Stöhlker3, Christophor Kozhuharov3, Xincheng Wang4, Alexander Gumberidze3, Uwe Spillmann3, Regina Reuschl3, Sebastian Hess3, Sergej Trotsenko3, Darek Banas3, Dieter Liesen3, Doris Jakubassa-Amundsen5, Joachim Ullrich1, Robert Moshammer1, Reinhard Dörner2, Hermann Rothard6, and Markus Steck3 — 1Max Planck Institut f. Kernphysik, Heidelberg, Deutschland — 2Inst. f. Kernphysik, Univ. Frankfurt, Deutschland — 3GSI, Darmstadt, Deutschland — 4Fudan University, Shanghai, China — 5Mathem. Institut, LMU, München — 6Ciril, Ganil, Caen, Frankreich
We have measured at the storage ESR for 90AMeV U(88+) + N2 differential cross sections for forward electron emission. Electrons emitted into a narrow forward cone around the projectile direction are momentum analyzed with a magnetic forward electron spectrometer of the dipole-quadrupole-dipole type equipped with a 2D position sensitive electron detector. Electrons are measured in coincidence with charge exchanged projectiles U(89+) for electron loss (ELC) and U(87+) for simultaneous electron capture to bound and continuum states (ECC2). The ELC cusp is very narrow and symmetric; it is attributed to projectile 2s ionization. In contrast the ECC2 cusp is visibly skewed to the low momentum side. Comparisons with theoretical calculations are in progress.