STRUCTURE AND LAMB SHIFT OF 2S(1 2)-2P(3/2) LEVELS IN LITHIUM-LIKE U89+ THROUGH NEON-LIKE U82+/

The first Doppler-shift-free crystal-spectrometer measurement of stati onary highly stripped uranium ions from a high-energy electron beam io n trap is presented. Thirteen 2s1/2-2p3/2 transitions in eight ionizat ion states between Li-like U89+ and Ne-like U82+ are identified and me asured with an accuracy as high as 37 ppm, providing benchmarks for te sting relativistic correlation and quantum electrodynamic effects in h ighly charged multielectron ions. A value of 47.39 +/- 0.35 eV is foun d for the 2s1/2 Lamb shift in Li-like U89+, in excellent agreement wit h theory.