Precise Lamb Shift Measurements in Hydrogen-Like Heavy Ions—Status and Perspectives
| Autor: | V. Andrianov, K. Beckert, A. Bleile, Ch. Chatterjee, A. Echler, P. Egelhof, A. Gumberidze, S. Ilieva, O. Kiselev, C. Kilbourne, H.-J. Kluge, S. Kraft-Bermuth, D. McCammon, J. P. Meier, R. Reuschl, T. Stöhlker, M. Trassinelli, Betty Young, Blas Cabrera, Aaron Miller |
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| Přispěvatelé: | Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Institut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Institut für Kernphysik, Goethe-Universität Frankfurt am Main |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Physics
Range (particle radiation) [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph] Detector 7. Clean energy 01 natural sciences Particle detector 010305 fluids & plasmas Ion Lamb shift 0103 physical sciences Quantum efficiency Atomic physics 010306 general physics Storage ring Line (formation) |
| Zdroj: | AIP Conference Proceedings AIP Conference Proceedings, American Institute of Physics, 2009, 1185, pp.99. ⟨10.1063/1.3292459⟩ AIP Conference Proceedings, 2009, 1185, pp.99. ⟨10.1063/1.3292459⟩ |
| ISSN: | 0094-243X 1551-7616 |
| DOI: | 10.1063/1.3292459⟩ |
| Popis: | International audience; The precise determination of the energy of the Lyman 1 and 2 lines in hydrogen-like heavy ions provides a sensitive test of quantum electrodynamics in very strong Coulomb fields. For the first time, a calorimetric low-temperature detector was applied in an experiment to precisely determine the transition energy of the Lyman lines of lead ions 207pb81+ at the Experimental Storage Ring (ESR) at GSI. The detectors consist of silicon thermistors, provided by the NASA/Goddard Space Flight Center, and Pb or Sn absorbers to obtain high quantum efficiency in the energy range of 40–80 keV, where the Doppler-shifted Lyman lines are located. The measured energy of the Lyman 1 line, E(Ly-1, 207Pb81+) = (77937±12stat±23syst) eV, agrees within errors with theoretical predictions. The systematic error is mainly due to uncertainties in the non-linear energy calibration of the detectors as well as the relative position of detector and gas-jet target. |
| Databáze: | OpenAIRE |
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