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Isotope shift in the dielectronic recombination of three-electron ANd57+ |
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| Authors: | Brandau C Kozhuharov C Harman Z Müller A Schippers S Kozhedub Y S Bernhardt D Böhm S Jacobi J Schmidt E W Mokler P H Bosch F Kluge H-J Stöhlker Th Beckert K Beller P Nolden F Steck M Gumberidze A Reuschl R Spillmann U Currell F J Tupitsyn I I Shabaev V M Jentschura U D Keitel C H Wolf A Stachura Z |
| Affiliation: | Gesellschaft für Schwerionenforschung (GSI), 64291 Darmstadt, Germany. c.brandau@gsi.de |
| Abstract: | Isotope shifts in dielectronic recombination spectra were studied for Li-like (A)Nd(57+) ions with A=142 and A=150. From the displacement of resonance positions energy shifts deltaE(142 150)(2s-2p(1/2))=40.2(3)(6) meV [(stat)(sys)] and deltaE(142 150)(2s-2p(3/2))=42.3(12)(20) meV of 2s-2p(j) transitions were deduced. An evaluation of these values within a full QED treatment yields a change in the mean-square charge radius of (142 150)deltar(2)=-1.36(1)(3) fm(2). The approach is conceptually new and combines the advantage of a simple atomic structure with high sensitivity to nuclear size. |
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