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Q: Fachverband Quantenoptik und Photonik

Q 63: Poster: Precision Spectroscopy of Atoms and Ions (with A)

Q 63.23: Poster

Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer

A way to detect the isomeric state I= (3/2)⁺ in ²²⁹Th with the use of LIF method — •Jerzy Dembczyński¹, Magdalena Elantkowska², and Jarosław Ruczkowski¹ — ¹Institute of Control and Information Engineering, Poznań University of Technology, Poznań, Poland — ²Laboratory of Quantum Engineering and Metrology, Poznań University of Technology, Poznań, Poland

The existence of a low-lying isomeric state at an energy of 7.6±0.5 eV was inferred from high-resolution gamma-ray spectroscopy [1]. Inamura and Haba [2] search for this state at a region 3.5 eV using a hollow-cathode electric discharge. Sakharow [3] questioned existing of this state at whole. Peik et al. [4] show that is possible to reach high lying electronic levels using a laser beam for the ²³²Th⁺. If the metastable state I=3/2 exist we should observe the effects of mixing of the nuclear wave functions of the ground state I=5/2 and the isomeric I=3/2 state via electronic shells. It will be revealed at the differences between the A- and B constants measured by means of the LIF methods and those predicted by semi-empirical calculations. Therefore, we consider advisable a systematic study of the hyperfine structure of the electronic levels of the ²²⁹Th atom or ions.

This work was supported by the Poznan University of Technology within the frame of the project 04/45/DSPB/0121

[1] E. Peik et al., arXiv:0812.3458 (2009)

[2] T.T. Inamura, H. Haba, Phys. Rev. C 79, 034313 (2009)

[3] S. L. Sakharov, Physics of at. Nuclei 73, 1-8 (2010)

[4] O. A. Herrera-Sancho et al.,Phys. Rev. A 85, 033402 (2012)