Title :
The 1s Lamb shift of hydrogen-like very heavy ions measured at an electron cooler
Author :
Beyer, Heinrich F.
Author_Institution :
Gesellschaft fur Schwerionenforschung mbH, Darmstadt, Germany
fDate :
4/1/1995 12:00:00 AM
Abstract :
Spontaneous capture of free cooling electrons by bare high-Z ions leads to the emission of X rays. The distinctive features of this new X-ray source for precision spectroscopy of high-Z few-electron systems are demonstrated. They enable a determination of the Lamb shift of hydrogen-like very heavy ions. Initial experiments have been conducted at the GSI Experimental Storage Ring in which the 1s Lamb shift has been found to be 202.3±7.9 eV for Au78+ and 470±16 eV for U91+
Keywords :
Lamb shift; X-ray production; X-ray spectroscopy; calibration; gold; positive ions; quantum electrodynamics; uranium; 194.4 to 210.2 eV; 456 to 486 eV; Au; Au78+; Doppler effect; ESR storage ring; H; Lamb shift; U; U91+; X-ray source; bare high-Z ions; beam velocity; electron cooler; emission of X rays; free cooling electrons; precision spectroscopy; spontaneous capture; very heavy ions; Cooling; Current measurement; Electron beams; Electron emission; Energy measurement; Ion beams; Projectiles; Radiative recombination; Spontaneous emission; Storage rings;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
