Expérimental Developments for the Lamb-Shift Investigation in Heavy Ions

Regina Reuschl (1) , D. Banas , Heinrich Beyer (1) , Alexander Gumberidze (1) , S. Hess (1) , Paul Indelicato (2) , Dieter Liesen (1) , D. Protic , Uwe Spillmann (1) , Thomas Stöhlker (1) , Martino Trassinelli (3, 1) , Sergiy Trotsenko (1) , G. Weber (1)

1 GSI - Helmholtz zentrum für Schwerionenforschung GmbH
2 LKB (Jussieu) - Laboratoire Kastler Brossel
3 INSP-E10 - Agrégats et surfaces sous excitations intenses

Results of the latest commissioning experiment of a two arm transmission crystal x-ray spectrometer in combination with a high-performance position-sensitive mircostrip germanium detector are presented. Due to the low photon efficiency of only 10(-8), both the position-sensitivity and the energy-resolution of the 2D-germanium detector are absolutely essential to perform experiments using crystal x-ray spectrometers. In this experiment we were aiming for a precise determination of the Ly-alpha transitions in H-like Ph81+ produced in collisions with a krypton gas jet at the ESR storage ring. Up to now, the most accurate determination of QED corrections to the ground state binding energy in a high-Z, H-like system was performed for H-like uranium with an accuracy on the 1% level.

Domaines: Physique Atomique [physics.atom-ph]

Regina Reuschl, D. Banas, Heinrich Beyer, Alexander Gumberidze, S. Hess, et al.. Expérimental Developments for the Lamb-Shift Investigation in Heavy Ions. AIP Conference Proceedings, 2009, 1099, pp.168. ⟨10.1063/1.3120005⟩. ⟨hal-00437901⟩