Testing the time dependence of the fundamental constants in the spectra of multicharged ions

Details Testing the time dependence of the fundamental constants in the spectra of multicharged ions Testing the time dependence of the fundamental constants in the spectra of multicharged ions

2005-05-11

arxiv.org/abs/physics/0505081v1

Physics

Atomic Physics

11 pages

Scientific paper

10.1103/PhysRevLett.94.243002

A new method for measuring a possible time dependence of the fine-structure constant ($\alpha$) is proposed. The method is based on the level-crossing in two-electron highly-charged ions facilitating resonance laser measurements of the distance between the levels at the point of crossing. This provides an enhancement factor of about $10^{3}$ in Helium-like Europium and thus reduces the requirements for the relative accuracy of resonance laser measurements at about $10^{-12}$.

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