Hannover 2010 – scientific programme
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A: Fachverband Atomphysik
A 25: Precision Spectroscopy of Atoms and Ions III
A 25.7: Talk
Friday, March 12, 2010, 12:00–12:15, F 107
Nuclear proton distributions explored by relativistic resonance fluorescence — •Octavian Postavaru1,2, Zoltán Harman1,2, and Christoph H. Keitel1 — 1Max-Plank-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2ExtreMe Matter Institute EMMI, Planckstrasse 1, 64291 Darmstadt, Germany
Resonance fluorescence of laser-driven atoms is studied in the relativistic regime by solving the time-dependent Dirac equation in a multi-level model. Electron spin and retardation of the electron-photon interaction give rise to phenomena such as splitting of sideband peaks and modification of the Rabi frequencies not explainable in a Schrödinger theory. The approach based on the Dirac equation allows for investigating highly relativistic ions and, consequently, provides a sensitive means to determine parameters of nuclear charge distributions by applying coherent light with x-ray frequencies. Using two driving fields, one may obtain sub-natural linewidths in the emission spectra, increasing the sensitivity of nuclear proton distribution determinations.