Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 10: Precision spectroscopy of atoms and ions II (with A)
Q 10.7: Vortrag
Montag, 17. März 2014, 15:30–15:45, BEBEL E42
Prediction of the oscillator strengths for the electric dipole transitions in Th II — •Jerzy Dembczyński1, Jarosław Ruczkowski2, and Magdalena Elantkowska2 — 1Institute of Control and Information Engineering, Faculty of Electrical Engineering, Poznań University of Technology, Piotrowo 3A, 60-965 Poznań, Poland — 2Laboratory of Quantum Engineering and Metrology, Faculty of Technical Physics, Poznań University of Technology, Nieszawska 13B, 60-965 Poznań, Poland
In order to parametrize the oscillator strength, the matrix of angular coefficients of the possible transitions in multiconfiguration system were calculated. In the odd and even configuration systems, the fine structure eigenvectors for both parities were obtained, using our semiempirical method, which taken into account also the second order effects, resulting from the excitations from electronic closed shells to open shells and from open shells to empty shell.
The correctness of the fine structure wave functions was verified by the comparison of calculated and experimental hyperfine structure constants for Th II available in the literature. The least square fit to experimental values for some transitions allow to obtain the values of radial parameters and predict the oscillator strengths values for all possible transitions from the levels under consideration.
These calculations are necessary for the design of the nuclear frequency standard based on the thorium ion.
This work was supported by The National Centre for Science under the project N N519 650740