EGAS41 - Swansea University

41 st EGAS CP 162 Gdańsk 2009
Systematic analysis of the even configurations of Ta II
E. Stachowska 1,∗ , J. Dembczyński 1 , F. Meijer 2 , L. Windholz 3
1 Chair of Quantum Engineering and Metrology, Poznań University of Technology, Poznań,
Poland
2 School of Physics, UCD, Dublin, Ireland
3 Institute of Experimental Physics, Graz University of Technology, Graz, Austria
∗ Corresponding author: ewa.stachowska@put.poznan.pl,
We studied the complex atomic structure of the tantalum ion. This was done using a new
package for semi-empirical calculations of the fine- and hyperfine structure [1], allowing
up to four open sub-shells. We included the following 25 configurations :
5d 4 + 5d 3 n ′ g (n ′ =5-6) + 5d 3 6s + 5d 3 6d + 5d 2 6s 2 + 5d 2 6sn ′ g (n ′ =5-6) +
5d 2 6sn ′′ d (n ′′ =6-10) + 5d 2 6sn ′′′ s (n ′′′ =7-10) + 5d 2 5f6p + 5d 2 6p 2 +
5d6s 2 n ′′ d (n ′′ =6-7) + 5d6s6p 2 + 5d5f6s6p + 5d5f6s7p + 5d6s6d7s.
We also calculated eigenvectors and g J -factors and improved the values of the parameters
for the configuration interactions, most complicated in this spectrum. For all energy levels
we obtained the exact spectroscopic description.
Acknowledgment
This work was partially supported by PUT (project DS 63-029/09).
References
[1] J. Ruczkowski et al., CP 199, 40th EGAS conference, Graz (2008)
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