Z. Harman

Isotope shift in the dielectronic recombination of three-electron ANd57+.

Isotope shifts in dielectronic recombination spectra were studied for Li-like (A)Nd(57+) ions with A=142 and A=150. From the displacement of resonance positions energy shifts deltaE(142 150)(2s-2p(1/2))=40.2(3)(6) meV [(stat)(sys)] and deltaE(142 150)(2s-2p(3/2))=42.3(12)(20) meV of 2s-2p(j) transitions were deduced. An evaluation of these values within a full QED treatment yields a change in the mean-square charge radius of (142 150)deltar(2)=-1.36(1)(3) fm(2). The approach is conceptually new and combines the advantage of a simple atomic structure with high sensitivity to nuclear size.

Extraction of the electron mass from g- factor measurements on light hydrogenlike ions

The determination of the electron mass from Penning- trap measurements with C-12(5+) 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 He-4(+) ions will enable a consistency check of the electron- mass value, and in the future an improvement of the He-4 nuclear mass and a determination of the fine-structure constant.

One-loop electron self-energy for the bound-electron g factor

We report calculations of the one-loop self-energy correction to the bound-electron

Zeeman splitting and g factor of the 1s22s22p 2P3/2 and 2P1/2 levels in Ar13+

g

Electron-correlation effects in the g factor of light Li-like ions

factor of the

Identifications of and EUV transitions of promethium-like Pt, Ir, Os and Re

1s

Nuclear-size self-energy and vacuum-polarization corrections to the bound-electron g factor

and

Correlation and quantum electrodynamic effects on the radiative lifetime and relativistic nuclear recoil in Ar13+ and Ar14+ ions

2s

Identifications of [equation presented] and [equation presented] EUV transitions of promethium-like Pt, Ir, Os and Re

states of light hydrogen-like ions with the nuclear charge number

Identifications of

Z \le 20