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          Institute: MPI für Kernphysik     Collection: Precision Spectroscopy and Ultracold Ensembles     Display Documents

ID: 278155.0, MPI für Kernphysik / Precision Spectroscopy and Ultracold Ensembles
Benchmarking high-field few-electron correlation and QED contributions in Hg75+...78+ ions: I. Experiment
Authors:González-Martínez, A. J.; Crespo López-Urrutia, J. R.; Braun, J.; Brenner, G.; Bruhns, H.; Lapierre, A.; Mironov, V.; Soria Orts, R.; Tawara, H.; Trinczek, M.; Ullrich, J.; Artemyev, A. N.; Harman, Z.; Jentschura, U. D.; Keitel, C. H.; Scofield, J. H.; Tupitsyn, I. I.
Date of Publication (YYYY-MM-DD):2006-05-23
Title of Journal:Physical Review A
Journal Abbrev.:Phys. Rev. A
Issue / Number:5
Start Page:1
End Page:10
Sequence Number of Article:052710
Copyright:©2006 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:The photorecombination of highly charged few-electron mercury ions Hg75+ to Hg78+ has been explored with the Heidelberg electron beam ion trap. By monitoring the emitted x rays (65–76 keV) and scanning the electron beam energy (45–54 keV) over the KLL dielectronic recombination (DR) region, the energies of state-selected DR resonances were determined to within ±4 eV (relative) and ±14 eV (absolute). At this level of experimental accuracy, it becomes possible to make a detailed comparison to various theoretical approaches and methods, all of which include quantum electrodynamic (QED) effects and finite nuclear size contributions (for a 1s electron, these effects can be as large as 160 and 50 eV, respectively). In He-like Hg78+, a good agreement between the experimental results and the calculations has been found. However, for the capture into Li-, Be-, and B-like ions, significant discrepancies have been observed for specific levels. The discrepancies suggest the need for further theoretical and experimental studies with other heavy ions along these isoelectronic sequences.
Classification / Thesaurus:34.80.Lx, 32.80.Hd, 52.25.Os
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group J. Ullrich/Electron Beam Ion Trap ( J.R. Crespo Lopez-Urrutia)
MPI für Kernphysik/ Group C.H. Keitel/Quantum Electrodynamics and High Precision Theory (U. D. Jentschura)
External Affiliations:St. Petersburg State University, St. Petersburg 198504, Russia
Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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