Hamburg 2009 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 15: Poster I

A 15.18: Poster

Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster

Laser excitation and light shifts of highly charged ions — •Octavian Postavaru, Zoltan Harman, and Christoph H. Keitel — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

Recent developments in laser technology allow the probing of highly charged ions in the strong field and in the x-ray domain, providing one new insights into relativistic electron dynamics, nuclear and quantum electrodynamic effects [1,2]. The interaction of ions with the laser field leads to resonant excitation of the bound electrons and to dynamic shifts of the energy levels. We apply a relativistic description of the excitation process and the light shifts by means of the Dirac equation, as necessary in the case of higher nuclear charges and for transitions which are nonrelativistically forbidden. We investigate excitation schemes by which the accuracy of measurements can be significantly improved, leading to new physical findings. The results are relevant for experiments with at present and near-future laser systems like the FLASH [1] and the PHELIX [2] facilities.

[1] S.W. Epp, J.R. Crespo López-Urrutia, G. Brenner et al., Phys. Rev. Lett. 98, 183001 (2007)

[2] P. Neumayer, R. Bock, S. Borneis et al., Laser and Particle Beams 23, 385 (2005)