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  • Articles: DFG German National Licenses  (2)
  • 2000-2004  (1)
  • 1975-1979  (1)
  • 2002  (1)
  • 1977  (1)
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  • Articles: DFG German National Licenses  (2)
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  • 2000-2004  (1)
  • 1975-1979  (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
    Semiclassical description of reactions at energies near the Coulomb barrier (1977)
    Springer
    The European physical journal 281 (1977), S. 391-394 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The modified semiclassical approximation of Coulomb matrix elements is extended to include effects of distorting nuclear potentials in the scattering wave functions. The applicability and efficiency of the proposed semiclassical method are discussed. The advantages of this approximation are shown for a typical heavy-ion transfer reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408188
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    Paper (German National Licenses)
    Fulltext
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