Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 2: Precision spectroscopy I
A 2.7: Vortrag
Montag, 19. März 2007, 12:15–12:30, 6G
Relativistic Nuclear Recoil, Electron Correlation and Quantum Electrodynamic Effects in Be- and B-like Argon Ions — •Z. Harman1, R. Soria Orts1, A. Lapierre1, J. R. Crespo López-Urrutia1, U. D. Jentschura1, A. N. Artemyev1,2, C. H. Keitel1, V. M. Shabaev2, H. Tawara1, I. I. Tupitsyn1,2, J. Ullrich1, and A. V. Volotka2 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — 2St. Petersburg State University, Oulianovskaya 1, 198504 St. Petersburg, Russia
The isotope shift [1] and the radiative decay rate [2] of the 1s2 2s2 2p 2P3/2 − 2P1/2 M1 transition and the g factor of these levels [3] in Ar13+ ions has been determined with high accuracy using the Heidelberg electron beam ion trap. Our isotope shift calculations are in excellent agreement with the experimental results and confirm that it is indispensable to include relativistic recoil corrections when predicting mass shift contributions in medium-Z ions. The lifetime corresponding to the above transition has been measured with an accuracy on the order of one per mil. Theoretical calculations predict a lifetime that is in significant disagreement with this high-precision experimental value. The g factor of the P states is determined with a 1.5 per mil accuracy by resolving the Zeeman components of the transition, in accordance with our theoretical results.
[1] R. Soria Orts et al., Phys. Rev. Lett. 97, 103002 (2006).
[2] A. Lapierre et al., Phys. Rev. Lett. 95, 183001 (2005).
[3] R. Soria Orts et al., to be published