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

Volume

44

Issue

2

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

510

Lastpage

513

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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.377894

Filename

377894