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Measurement of the ground-state lambshift of hydrogenlike uranium at the electron cooler of the ESR |
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| Authors: | H. F. Beyer G. Menzel D. Liesen A. Gallus F. Bosch R. Deslattes P. Indelicato Th. Stöhlker O. Klepper R. Moshammer F. Nolden H. Eickhoff B. Franzke M. Steck |
| Affiliation: | 1. Gesellschaft für Schwerionenforschung (GSI), Planckstrasse 1, D-64291, Darmstadt, Germany 2. National Institute of Standards and Technology, 20899, Gaithersburg, MD, USA 3. Laboratoire de Physique Atomique et Nucléaire, Institut de Radium, Université Pierre et Marie Curie, T12, Bo?te 93, F-75252, Paris Cedex 05, France |
| Abstract: | X-rays are emitted with the radiative recombination of free electrons in an electron cooler of a heavyion storage ring. Due to a small width of the X-ray lines, an observation angle close to 0° and an accurate determination of the ion velocity, the ground-state Lambshift of hydrogenlike uranium (470 ± 16) eV could be measured to an accuracy of 3.4%. A re-evaluation of a measurement of the 1s1/2 Lambshift in hydrogenlike gold gave a new value of (202.3 ± 7.9) eV as compared to the former value of (212 ± 15) eV. The results are in excellent agreement with QED calculations and are more precise than any other measurements previously reported for a high-Z, hydrogenlike ion. |
| Keywords: | KeywordHeading" >PACS 31.30.7 34.80.L 32.30.R |
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