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Article Dans Une Revue AIP Conference Proceedings Année : 2009

Precise Lamb Shift Measurements in Hydrogen-Like Heavy Ions—Status and Perspectives

V. Andrianov
  • Fonction : Auteur
A. Bleile
  • Fonction : Auteur
Ch. Chatterjee
  • Fonction : Auteur
A. Echler
  • Fonction : Auteur
P. Egelhof
  • Fonction : Auteur
S. Llieva
  • Fonction : Auteur
O. Kiselev
  • Fonction : Auteur
C. Kilbourne
  • Fonction : Auteur
H.-J. Kluge
  • Fonction : Auteur
S. Kraft-Bermuth
  • Fonction : Auteur
D. Mccammon
  • Fonction : Auteur
J. Meier
  • Fonction : Auteur

Résumé

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.
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Dates et versions

hal-00537629 , version 1 (18-11-2010)

Identifiants

Citer

V. Andrianov, K. Beckert, A. Bleile, Ch. Chatterjee, A. Echler, et al.. Precise Lamb Shift Measurements in Hydrogen-Like Heavy Ions—Status and Perspectives. AIP Conference Proceedings, 2009, 1185, pp.99. ⟨10.1063/1.3292459⟩. ⟨hal-00537629⟩
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