Abstract
Dielectronic recombination of Pb53+ has been studied and a resonance is detected only ∼ 10-4 eV above the ground state. The possibility to determine the Pb53+ (4p1/2) – Pb53+ (4s1/2) energy splitting with a similar accuracy from the determination of the resonance position is discussed. Such a precision can only be achieved by calculations which treat quantum electrodynamics (QED) in a many-body environment at a level which can still not be reached. A fully relativistic many-body calculation of the splitting is described and the uncertainties are discussed.
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