Hannover 2003 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

A: Atomphysik

A 1: Hochauflösende Spektroskopie 1

A 1.5: Vortrag

Montag, 24. März 2003, 12:00–12:15, F342

Li-like Uranium — •Daniel Ursescu¹, Paul Neumayer^1,2, Marco Tomaselli¹, Lon-chang Liu³, Thomas Kühl¹, and Stephan Fritzsche⁴ — ¹PHELIX, GSI-Gesellschaft fuer Schwerionenforschung, D-64291 Darmstadt, Deutschland — ²Technische Universitaet Darmstadt, D-64289 Darmstadt, Deutschland — ³T-Division, Los Alamos National Laboratory, NM 87545, USA — ⁴Kassel Universitaet, D-34132 Kassel, Deutschland

A Soft X-Ray laser driven by the front-end of the PHELIX (Petawatt High Energy Laser for Ions eXperiments) will soon allow to perform laser spectroscopy on Li-like ions. In the calculation of the transition energy for 1s²−2s ⇒ 1s²−2p has been shown that nuclear structure plays a key role. Nuclear models applied to heavy nuclei are then an important tool [1] to set a limit between nuclear and QED contributions. For these reasons we perform calculations for Uranium isotopes [2]. Results are presented for the nuclear charge radii of ^235,238U and for the HFS or the ²³⁵U^91+,89+ ions. Particular care has been taken in the calculation of the nuclear matrix elements which cover the 2ℏω single particle states. New programs have been developed to improve the precisions of these calculations through symbolic evaluation of the involved transformations coefficients (Moshinski [3],L·S). [1] M. Tomaselli et al., Hyperfine Interactions, (2002) to be published. [2] M. Tomaselli et al., Can. J. of Phys. 80 (2002). [3] T.A. Brody, G. Jacob, and M. Moshinski, Nucl. Phys. 17, 16 (1960).