Berlin 2001 – wissenschaftliches Programm
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A: Atomphysik
A 10: Posters Wednesday (Cooling and Trapping, Electron Scattering and Recombination)
A 10.33: Poster
Mittwoch, 4. April 2001, 12:30–15:00, AT3
Enhancement of dielectronic recombination by external electromagnetic fields — •Sebastian Böhm1, A. Müller1, S. Schippers1, W. Shi1, H. Danared2, R. Schuch2, W. Zong2, P. Glans2, N. Eklöw2, G. H. Dunn3, B. Jelenković3, N. Djurić3, and N. Badnell4 — 1Institut für Kernphysik, Universität Giessen, — 2Manne Siegbahn Laboratory, Stockholm, Sweden — 3JILA, University of Colorado, Boulder USA — 4University of Strathclyde, Glasgow, United Kingdom
Within a series of measurements (Si11+, Cl14+, Ti19+ and Ni25+) [1,2] the influence of external electromagnetic fields on dielectronic recombination (DR) has been investigated. With measurements on Ne7+ and O5+ ions this series has been extended to lower values of the nuclear charge number Z. A new aspect in the present experiment with O5+ ions was the variation of the ion energy. The magnetic fields in the bending dipole magnets have to be varied accordingly. Thus the electric fields which are responsible for field ionization of Rydberg states formed by DR can be varied in a controlled manner. In this way the influence of external fields on a bandwidth of states can be analyzed.
[1] T. Bartsch et al. Phys. Rev. Lett. 79, 2233 (1997); 82, 3779 (1999); J. Phys. B 33, L453 (2000).
[2] S. Schippers et al., Phys. Rev. A. 62, 022708 (2000).