Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 26: Poster: Atomic systems in external fields
A 26.7: Poster
Mittwoch, 14. März 2012, 16:30–19:00, Poster.V
Two-photon transitions of high-Z few electron ions in strong laser fields — •Thorsten Jahrsetz1,2 and Andrey Surzhykov1,2 — 1Physikalisches Institut University of Heidelberg — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, German
During the last decades, two-photon transitions in highly charged heavy ions have attracted much attention as a promising tool for studying atomic parity-violation (PV) effects [1]. For example, the 1s1/2 2s1/2: J =0 → 1s1/2 2p1/2: J =0 transition of helium-like uranium, when induced by polarized light, should proceed via the PV electric-dipole 2E1 channel and provide an accurate probe of parity non-conservation. Theoretical predictions for this transition clearly indicate the need for high-intensity lasers in order to make the parity-violating transitions visible [2]. However, such intense laser fields also may lead to sizable Stark shift and mixing of different ionic levels even in the high-Z regime. In this contribution, therefore, we apply the Green’s function approach and relativistic Dirac theory in order to investigate the influence of Stark effects on the total as well as differential two-photon rates. Special emphasis in our analysis is placed on the (laser-dressed) 2p1/2 → 1s1/2 and 1s1/2 2p1/2: J =0 → 1s1/22: J = 0 transitions in hydrogen-and helium-like heavy ions.
[1]A Schäfer et al. PRA 40,12(1989)
[2] A. Surzhykov et al., Phys. Rev. A 84, 022511 (2011)
This work was supported by the Helmholtz Gemeinschaft (Nachwuchsgruppe VH-NG-421).