Enhanced sensitivity to the fine-structure constant variation in Th IV atomic clock transition

Details Enhanced sensitivity to the fine-structure constant variation in Th IV atomic clock transition Enhanced sensitivity to the fine-structure constant variation in Th IV atomic clock transition

2009-10-19

arxiv.org/abs/0910.3459v1

Phys. Rev. A 80, 064502 (2009)

Physics

Atomic Physics

Scientific paper

10.1103/PhysRevA.80.064502

Our calculations have shown that the 5f_5/2-7s_1/2 23131 cm^{-1} transition from the ground state in the ion Th^{3+} is very sensitive to the temporal variation of the fine structure constant alpha (q=-75300 cm^{-1}). The line is very narrow, the ion has been trapped and laser cooled and the positive shifter line 5f_5/2-5f_7/2 4325 cm^{-1} (q=+2900 cm^{-1}) may be used as a reference. A comparison may also be made with a positive shifter in another atom or ion. This makes Th^{3+} a good candidate to search for the alpha variation.

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