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  • 2000-2004  (1)
  • 1990-1994  (1)
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  • 2002  (1)
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  • 2000-2004  (1)
  • 1990-1994  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Electron–positron pair production in the external electromagnetic field of colliding relativistic heavy ions (2002)
    Springer
    The European physical journal 23 (2002), S. 545-550 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The results concerning the $e^+e^-$ production in peripheral highly relativistic heavy-ion collisions presented in a recent paper by Baltz et al. are rederived in a very straightforward manner. It is shown that the solution of the Dirac equation directly leads to the multiplicity, i.e. to the total number of electron–positron pairs produced by the electromagnetic field of the ions, whereas the calculation of the single pair production probability is much more involved. A critical observation concerns the unsolved problem of seemingly absent Coulomb corrections (Bethe–Maximon corrections) in pair production cross sections. It is shown that neither the inclusion of the vacuum–vacuum amplitude nor the correct interpretation of the solution of the Dirac equation concerning the pair multiplicity is able the explain (from a fundamental point of view) the absence of Coulomb corrections. Therefore the contradiction has to be accounted to the treatment of the high energy limit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100520200891
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    SCA calculations of the inner shell ionization with Dirac-Fock electronic wave functions (1994)
    Springer
    The European physical journal 29 (1994), S. 151-158 
    Details
    ISSN: 1434-6079
    Keywords: 31.70.Hg ; 34.50.Fa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The theory of inner shell ionization for arbitrary atomic shells is reviewed. Emphasis is onL- andM-shells in order to show how the proper screening formalism entering the electronic form factor affects the ionization probabilities. The radial wavefunctions in the form factor are computed as relativistic Hartree-Fock orbitals for both bound and continuum states. The continuum orbitals were evaluated in theV(N−1) potential with correct exchange. These results are then compared with the previous ones using screened hydrogen-like wavefunctions and also with the experimental data in some cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437132
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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