Hyperfine Interactions

, Volume 171, Issue 1, pp 93–107

Precision spectroscopy at heavy ion ring accelerator SIS300


DOI: 10.1007/s10751-007-9509-4

Cite this article as:
Backe, H. Hyperfine Interact (2006) 171: 93. doi:10.1007/s10751-007-9509-4


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 2P1/22S1/2 transition for all elements and at the 2P3/22S1/2 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.

Key words

laser spectroscopy relativistic lithium-like ions, laser cooling hyperfine spectroscopy nuclear polarization SIS300 



Facility for Antiproton and Ion Research


Heavy Ion


Quantum Electrodynamics


Charge Coupled Device


Electron Beam Ion Trap

Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  1. 1.Institut für KernphysikJohannes Gutenberg-Universität MainzMainzGermany

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