Abstract
Unique spectroscopic possibilities open up if a laser beam interacts with relativistic lithium-like ions stored in the heavy ion ring accelerator SIS300 at the future Facility for Antiproton and Ion Research FAIR in Darmstadt, Germany. At a relativistic factor γ = 36 the 2P1/2 level can be excited from the 2S1/2 ground state for any element with frequency doubled dye-lasers in collinear geometry. Precise transition energy measurements can be performed if the fluorescence photons, boosted in forward direction into the X-ray region, are energetically analyzed with a single crystal monochromator. The hyperfine structure can be investigated at the 2P1/2−2S1/2 transition for all elements and at the 2P3/2−2S1/2 transition for elements with Z≤50. Isotope shifts and nuclear moments can be measured with unprecedented precision, in principle even for only a few stored radioactive species with known nuclear spin. A superior relative line width in the order of 5·10−7 may be feasible after laser cooling, and even polarized external beams may be prepared by optical pumping.
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Abbreviations
- FAIR:
-
Facility for Antiproton and Ion Research
- HI:
-
Heavy Ion
- QED:
-
Quantum Electrodynamics
- CCD:
-
Charge Coupled Device
- EBIT:
-
Electron Beam Ion Trap
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Backe, H. Precision spectroscopy at heavy ion ring accelerator SIS300. Hyperfine Interact 171, 93–107 (2006). https://doi.org/10.1007/s10751-007-9509-4
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DOI: https://doi.org/10.1007/s10751-007-9509-4