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  • Artikel: DFG Deutsche Nationallizenzen  (4)
  • 1980-1984  (4)
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  • Artikel: DFG Deutsche Nationallizenzen  (4)
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  • 1
    Digitale Medien
    Digitale Medien
    Critical remarks on a scaling law for inner-shell ionization (1983)
    Springer
    The European physical journal 311 (1983), S. 151-155 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract In superheavy quasimolecules the number of created 1sσ-vacancies per collisionsP 1sσ can be evaluated approximately by a simple scaling law. This analytical relation correctly reproduces the measured dependence ofP 1sσ on the impact parameter, bombarding energy and combined nuclear chargeZ=Z 1+Z 2. It is emphasized, however, that the absolute ionization magnitude is underestimated typically by a factor of four. This discrepancy has been successfully resolved by the inclusion of multi-step excitation processes. It is shown that the derivation of the normalization constant in a scaling law previously reported by Armbruster's group is incorrect in the framework of first order perturbation theory.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01415099
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Positrons from supercritical fields of giant nuclear systems (1983)
    Springer
    The European physical journal 313 (1983), S. 263-279 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract During collisions of heavy nuclei with a combined chargeZ≳160 the electronic 1s-state is deeply bound due to the strong Coulomb field, forZ≧173 it even enters as a resonance the lower continuum of the Dirac-Hamiltonian. In pure Rutherford scattering no qualitative indication for the filling of a dynamically createdK-hole by the spontaneous positron creation process is predicted, but the study of heavy-ion collisions with nuclear time delay due to the attractive nuclear force promises clear signatures for the decay of the vacuum. Emphasis is laid also on the quantitative influence of the electron-electron interaction and ofE0-transitions in the giant nuclear system on positron emission, the latter treated in a classical approximation. We compare our results with recent experimental data of two different groups at GSI, Darmstadt.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01439478
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    K-vacancy formation in deep inelastic nuclear reactions (1981)
    Springer
    The European physical journal 299 (1981), S. 90-90 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01415747
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Systematics of inner-shell ionization in superheavy quasimolecules (1981)
    Springer
    The European physical journal 299 (1981), S. 189-194 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We present a detailed comparison of theoretical results on 1sσ-ionization probabilities andδ-electron production rates with recent experimental data. The investigations are restricted to collisions of very heavy ions with (Z 1+Z 2)α≳1 below the Coulomb barrier. It is emphasized that first order time dependent perturbation theory is inapplicable for an accurate theoretical description of the measured data.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01443935
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