Dielectronic and Radiative Recombination of Lithium-like Gold

• Published in: Physical review letters Vol. 69; no. 19; pp. 2768 - 2771
• Main Authors: Spies, W, Muller, A, Linkemann, J
• Format: Journal Article
• Language: English
• Published: 09-11-1992
• ISSN: 0031-9007
• DOI: 10.1103/PhysRevLett.69.2768

The first measurements on radiative and dielectronic recombination (RR and DR) of very highly charged ions at energies E sub cm as low as 0-50 eV are reported. Novel techniques were employed at the heavy-ion storage ring ESR to obtain absolute recombination rates of Au exp 76+ (1s exp 2 2s). The increase of the RR rate for E sub cm - > 0 could be recorded and single DR resonances in Au exp 75+ (1s exp 2 2p sub 3/2 6l exp j ) resolved. The experimental data allow sensitive judgement of calculations based on the Bethe--Salpeter approach to RR combined with results for DR from perturbative-relativistic, semirelativistic, and fully relativistic theories. Significant discrepancies are found only in the energy region of the 2p sub 3/2 6l sub 3/2 resonances.