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  • 2000-2004  (2)
  • 1980-1984  (3)
  • 1970-1974  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Buchbesprechungen (1981)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 32 (1981), S. 234-236 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00946751
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    Paper (German National Licenses)
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  • 2
    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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  • 3
    Electronic Resource
    Electronic Resource
    Semiclassical treatment of light-ion induced alignment of theL 3-subshell in heavy atoms (1982)
    Springer
    The European physical journal 304 (1982), S. 75-78 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Light ion induced alignment measurements ofL 3-subshell in heavy atoms are analyzed within the framework of the semiclassical theory of inner shell ionization. Coulomb deflection effects are exactly taken into account by hyperbolic classical orbits while the electron in the initial and final states is approximated by screened relativistic hydrogenic wave functions. Satisfactory agreement between experiments and theory is obtained for proton- and α-particle induced reactions within the whole region of bombarding energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01432278
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Screened Coulomb trajectory effects on inner shell ionization (1982)
    Springer
    The European physical journal 309 (1982), S. 13-18 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Electron screening effects influence the classical trajectory of the projectile. The influence of this effect on inner shell ionization probabilities is studied. We compare calculations with straight lines trajectories to trajectories in a screened and in an unscreened Coulomb potential. Rather simple prescriptions are found which allow to take the screening effects into account using “modified Coulomb trajectories”. Their accuracy is investigated and demonstrated for a number of representative examples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01420145
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Coulomb corrections for coherent electroproduction of vector mesons: Eikonal approximation (2004)
    Springer
    The European physical journal 21 (2004), S. 161-167 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Virtual radiative corrections due to the long-range Coulomb forces of heavy nuclei with charge Z may lead to sizeable corrections to the Born cross-section usually used for lepton-nucleus scattering processes. An introduction and presentation of the most important issues of the eikonal approximation is given. We present calculations for forward electroproduction of rho-mesons in a framework suggested by the VDM (vector dominance model), using the eikonal approximation. It turns out that Coulomb corrections may become relatively large. Some minor errors in the literature are corrected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epja/i2003-10182-3
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    On the theory of stripping reactions into the continuum (1974)
    Springer
    The European physical journal 267 (1974), S. 103-109 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A formulation of stripping reactions into the continuum is given taking the(d, p)-reaction as a specific example. We use the DWBA and the assumption that contributions from the nuclear interior are negligible. Under these assumptions we show that the cross section can be split into a “distortion matrix element” and a term depending on the neutron target interaction only through the phase shifts of the corresponding elastic neutron scattering. The interference with the “pure break-up” process is discussed. The connection between stripping to bound and unbound states in the limit of zero binding energy is established. A comparison with recent experimental results is given, where the “distortion matrix elements” are calculated, for the sake of simplicity, in the “Butler approximation”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01668636
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    Paper (German National Licenses)
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