Berlin 2001 – wissenschaftliches Programm
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A: Atomphysik
A 2: Ion Scattering I
A 2.8: Vortrag
Montag, 2. April 2001, 17:30–17:45, H1028
Hyperfine Splitting of Hydrogenlike Thallium — •M. Tomaselli1, T. Kühl2, D. Marx2, A. Dax2, W. Nörtershäuser2,3, H. Wang2, and S. Fritzsche4 — 1Institut für Kernhysik, Darmstadt Universität, D-64289 Darmstadt — 2GSI Gesellschaft für Schwerionenforschung, 64291 Darmstadt — 3Institut für Physik, Tübingen Universität, D-72076 Tübingen — 4Institut für Physik, Kassel Universität, D-34132 Kassel
The ground-state nuclear wave functions of 203Tl, 205Tl, and 207Tl are calculated within the Dynamic-Correlation Model [1]. The resulting wave functions are characterized by the strong mixing amplitudes of the valence 3s1/2−1 hole to the intrinsic vacuum states (valence hole coupled to core excitations) and are used to calculate magnetic moments, nuclear radii and hyperfine splitting for the Tl isotopes. The experimental magnetic moments and nuclear radii of the ground states are well reproduced. The hyperfine splitting of the hydrogenlike Tl isotopes has not been measured so far, hence, the obtained values are only compared with predictions of other theoretical calculations [2,3]. The difference in energy due to the hyperfine structure for 203Tl80+ and 205Tl80+ is found to be 3.1 nm.
[1] M. Tomaselli, Phys. Rev. C 37, 349 (1988); Ann. Phys. 205, 362 (1991); Phys. Rev. C 48, 2290 (1993).
[2] M.G.H. Guvstavsson, Chr. Forsse’n, and A.-M. Mårtensson-Pendrill, Hyperfine Interactions 127, 437 (2000).
[3] V.M. Shabaev et al., Phys. Rev. A 56, 252 (1997).