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Digitale Medien

Intercombination transition rates in Al-like ions (1998)

Träbert, E. ; Staude, U. ; Bosselmann, P. ; [weitere]

Springer

The European physical journal 2 (1998), S. 117-123

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ISSN: 1434-6079

Schlagwort(e): PACS. 32.30.Jc Visible and ultraviolet spectra[:AND:] 32.70.Fw Absolute and relative intensities - 34.50.Fa Electronic excitation and ionization of atoms (including beam-foil excitation and ionization)

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract: N =3, intercombination transitions in Al-like ions of Au have been studied by time-resolved EUV spectroscopy of foil-excited ion beams. Wavelengths and lifetimes are compared to the available relativistic calculations. The theoretical data are found to be useful for guidance, but of clearly insufficient precision, in particular for the transition probabilities.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/s100530050120

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Digitale Medien

X ray spectroscopic intercomparison between hydrogenic ions of different Z as a method for determining Lamb shifts (2000)

Tarbutt, M.R. ; Mokler, P.H. ; Myers, E.G. ; [weitere]

Springer

Hyperfine interactions 127 (2000), S. 333-337

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ISSN: 1572-9540

Schlagwort(e): QED ; hydrogenic ions

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Novel methods for determining the 1s Lamb shift of hydrogenic ions are outlined. In one method the energy of a 2–1 transition in the hydrogenic ion of nuclear charge Z is compared to a 4–2 transition in the hydrogenic ion of charge 2Z. A second method exploits close coincidences between Lyman series transitions in ions of similar Z.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1012688811322

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Recombination of U 92 + ions with electrons (2001)

Shi, W. ; Böhm, S. ; Böhme, C. ; [weitere]

Springer

The European physical journal 15 (2001), S. 145-154

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ISSN: 1434-6079

Schlagwort(e): PACS. 34.80.Lx Electron-ion recombination and electron attachment – 29.20.Dh Storage rings

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract: Recombination of fully stripped U92+ ions with electrons has been investigated at the Experimental Storage Ring (ESR) in Darmstadt. Absolute recombination rate coefficients have been measured for relative energies from 0 to 33 eV. For energies greater than 20 meV the experimental result is well described by the theory for radiative recombination (RR). Below 20 meV the experimental rate increasingly exceeds the RR calculation as observed previously in the recombination of light bare ions as well as of Bi83+. This low-energy rate enhancement is shown to scale as Z2.6 for bare ions, where Z is the atomic number of the ion. The U92+ recombination rate enhancement is insensitive to changes of the electron density. Variation of the magnetic guiding field strength from 80 mT to 120 mT resulted in oscillations of the recombination rate at 0 eV. The oscillations are partly attributed to changes of the transverse electron temperature accompanying the change of the magnetic guiding field strength; partly they may be caused by uncompensated small changes of the interaction angle between the two beams.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/s100530170160

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