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  • 1
    Digitale Medien
    Digitale Medien
    Microscopic investigations of pion production in heavy-ion collisions (1987)
    Springer
    The European physical journal 326 (1987), S. 97-106 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70−z ; 25.90+k ; 13.75 Gx
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Production mechanisms for subthreshold pions in nucleus-nucleus collisions are studied on a microscopic level. The non-relativistic expansion of the pseudoscalar πNN-vertex provides a basis for the construction of several two-nucleon models. These are incorporated into a dynamical description of the heavy-ion collision by boosted harmonic oscillators that adopts essential features from TDHF. The approach allows for a separate analysis of the various production processes and the influence of the collision dynamics on the total pion yield. Results are presented for the system16O +16O at laboratory energies of 40 and 80 MeV per nucleon.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294576
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Photon production in nucleon-nucleon collisions (1991)
    Springer
    The European physical journal 339 (1991), S. 391-398 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 14.80.Am ; 25.20.Gf ; 25.20.Lj
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We calculate the differential cross section for nucleonnucleon bremsstrahlung in covariant way based on a realistic meson-exchange approximation for the NN-scattering amplitude. The results are discussed in comparison to semiclassical approximations and with respect to the role of internal radiation diagrams. The influence of the anomalous magnetic moment on the proton-neutron bremsstrahlung is found to contribute up to 50% for specific kinematical conditions. Recent measurements on the elementary differential cross sectionpn→pnγ are found to be quite accurately reproduced. Furthermore, for use in proton-nucleus and nucleus-nucleus collisions, we present a parametrization of thepnγ cross section within a broad kinematical range.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01560642
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Thermal properties of nuclei: The implications of Levinson's theorem (1985)
    Springer
    The European physical journal 322 (1985), S. 647-653 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 05.70.Fh ; 11.20.Fm ; 24.60.-k
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Using only the close connection between the bound-state properties of a potential and its scattering phase shifts, a limiting excitation energy of a finite nucleus is predicted. Calculations for208Pb give its value as 8.2 MeV/A. The excitation-energy dependence of the level-density parameter is also discussed and the connection with astrophysical calculations of stellar collapse rates is indicated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01415147
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Isospin equilibration in relativistic heavy-ion collisions (1999)
    Springer
    The European physical journal 5 (1999), S. 77-84 
    Details
    ISSN: 1434-601X
    Schlagwort(e): PACS:25.75.+r Relativistic heavy-ion collisions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: We study the mixing and the kinetic equilibration of projectile and target nucleons in relativistic heavy-ion collisions in the energy regime between 150 AMeV and 2 AGeV in a coupled-channel BUU (CBUU) approach. We find that equilibrium in the projectile-target degrees of freedom is in general not reached even for large systems at low energy where elastic nucleon-nucleon collisions dominate. Inelastic nucleon excitations are more favorable for equilibration and their relative abundance increases both with energy and mass. Experimentally, the projectile/target admixture can be determined by measuring the degree of isospin equilibration in isospin asymmetric nuclear collisions. For one of the most promising systems currently under investigation, 96 44Ru +96 40Zr, we investigate the influence of the equation of state and the inelastic in-medium cross section.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100500050259
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