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A: Atomphysik

A 11: Atomspektroskopie

A 11.8: Talk

Wednesday, March 6, 2002, 18:15–18:30, HS 01/EZ04

Interpretation of g-factor Measurements of ¹⁵¹Eu⁺ — •Ewa Stachowska¹, Gustaw Szawiola¹, Sascha Trapp², Giovanni Tommaseo², and Günter Werth² — ¹Katedra Fizyki Atomowej, Politechnika Poznańska, PL-60-965 Poznan, Poland — ²Institut für Physik, Johanes Gutenberg Universität, D-55099 Mainz, Germany

The first- and the second-order perturbations effects have been investigated to refine the values of g_I and g_J -factors of europium ion from the high precision HFS and Zeeman splitting measurements in the Penning trap [1]. The method of calculations, which has been applied here, is based on effective operators approach [2]. With relatively small number of experimental data this allows to take into consideration not only the effect involving the states belonging to ground fine structure levels but also (to some extent) to account for the contributions causing breakdown of J as a good quantum number. Finally, treating g_I and g_J -factors as free parameters, their corrected values are extracted by iterative fitting and diagonalization of the effective Hamiltonian HFS and Zeeman matrix.

Supported by the Deutsche Forschungsgemeinschaft and partially by Poznan University of Technology under the project DS 63-022/02.

[1] S. Trapp, Thesis, Mainz 2001(unpublished)

[2] L. Jr.Armstrong, Theory of the Hyperfine Structure of Free Atoms, Wiley-Interscience,(1971)