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Measurement of the gj factor of hydrogenic ions: a sensitive test of bound state QED
Authors:K Hermanspahn  W Quint  S Stahl  M Tönges  G Bollen  H -J Kluge  R Ley  R Mann  G Werth
Institution:(1) Institut für Physik, Johannes-Gutenberg-Universität Mainz, Germany;(2) GSI, Darmstadt, Germany;(3) CERN, Germany
Abstract:Theg j factor measurement of hydrogenic ions in the 1s ground state is with an expected accuracy of 10–7 a sensitive test of bound state QED. We expect to determine the deviations from the free electron value, caused by relativistic and radiative corrections, up to the orderagr/4pgr(Zagr) 2 with an accuracy of 1%. As a first step, light ions like C5+ will be investigated. Later on, heavier hydrogenic ions up to U91+ will be examined using the accelerator facilities at GSI in Darmstadt.
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