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MPINP:
Präzisionsexperimente - Abteilung Blaum
MPINP:
Research group Z. Harman – Division C. H. Keitel
Abstract:
The determination of the electron mass from Penning-trap measurements with 12C5+ ions and from theoretical results for the bound-electron g factor is described in detail. Some recently calculated contributions slightly shift the extracted mass value. Prospects of a further improvement of the electron mass are discussed both from the experimental and from the theoretical points of view. Measurements with 4He+ ions will enable a consistency check of the electron-mass value, and in the future an improvement of the 4He nuclear mass and a determination of the fine-structure constant.