Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 35: Poster: Precision spectroscopy of atoms and ions (with Q)

A 35.23: 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 Ruczkowski11Institute 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)

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