QED effects in Cu-like Pb recombination resonances near threshold.
In an electron-ion recombination study with Pb53+ dielectronic recombination resonances are found for as low as approximately 10(-3)-10(-4) eV relative energy. The resonances have been calculated by relativistic many-body perturbation theory and through comparison with experiment the Pb53+(4p(1/2)-4s(1/2)) energy splitting of approximately 118 eV is determined with an accuracy comparable to the position of the first few resonances, i.e., approximately 10(-3) eV. Such a precision provides a test of QED in a many-body environment at a level which can still not be reached in calculations.
Lindroth
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Department of Atomic Physics, Stockholm University, Frescativägen 24, SE-104 05 Stockholm, Sweden.
Danared
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Glans
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Pesić
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Tokman
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Vikor
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Schuch
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