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Digitale Medien

p3/2-alignment following heavy ion impact (1991)

Meierkord, W. ; Blümke, T. ; Brüssermann, M. ; [weitere]

Springer

The European physical journal 18 (1991), S. 75-84

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ISSN: 1434-6079

Schlagwort(e): 34.50.Fa ; 32.30.Rj ; 32.70.Jz

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The energy dependence of the alignment of42Mo,47AgL 3 shell and79Au,90ThM 3 shell following impact ionization by ions with atomic numberZ 1=2 (helium) toZ 1=18 (argon) was studied with a 5 in Johansson crystal spectrometer analyzing the degree of X-ray polarization. Experimental information about the amount of multiple ionization was obtained. The observed small negative alignment is concerned to be due to dealignment by couplings between the created vacancies. Large positive values of the alignment parameter as previously reported for the79AuL 3 shell is slow heavy ion collisions were not observed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01418171

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Digitale Medien

M 3-alignment of gold by 0.16-5 MeV proton impact ionization (1991)

Blümke, T. ; Meierkord, W. ; Menzebach, H. -U. ; [weitere]

Springer

The European physical journal 21 (1991), S. 131-135

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ISSN: 1434-6079

Schlagwort(e): 34.50.Fa ; 32.30.Rj ; 07.85. + n

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The alignment of theM 3 subshell of gold following proton impact ionization was studied with projectile energies in the range from 160 keV up to 5MeV. The experiments were performed by measuring the polarization of emittedM X-rays be means of a 5 in. Johansson crystal spectrometer. A good agreement of the experimental data and the results of theoretical SCA calculations was found.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01425591

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Digitale Medien

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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