Berlin 2001 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
A: Atomphysik
A 19: Electrons, incl. Scattering and Recombination
A 19.2: Vortrag
Freitag, 6. April 2001, 16:00–16:15, H1028
Recoil spectroscopy with laser-cooled trapped Na-atoms — •J.W. Turkstra1, R. Hoekstra1, S. Knoop1, D. Meyer2, and R. Morgenstern1 — 1KVI, Rijksuniversiteit Groningen, Zernikelaan 25, NL-9747 AA Groningen, The Netherlands — 2Experimentalphysik insbes. Gaselektronik, Ruhr-Universität Bochum, D-44780 Bochum, Germany
We have studied electron transfer processes during collisions of highly charged ions on an atomic Na target. To this end the Na atoms are cooled and trapped in a magneto optical trap (MOT) by means of laser radiation. Position and arrival time of the Naq+ ions resulting from the collisions are measured with a position sensitive detector, and from this the corresponding recoil momenta are deduced. Momentum transfer perpendicular to the O6+, C6+ and He2+ projectile beam direction increases drastically with increasing number of transferred electrons. We observe transfer of up to 3 electrons for He2+ and up to 4 electrons for O6+ and C6+. We compare the experimental results with predictions of the classical over-the-barrier model and with classical trajectory Monte Carlo calculations.