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  • 1
    Electronic Resource
    Electronic Resource
    Three-dimensional calculations on the formation of density isomers in high energy heavy ion collisions (1979)
    Springer
    The European physical journal 290 (1979), S. 297-300 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A three dimensional fluid dynamical model is used to investigate the possibility of forming superdense abnormal nuclear matter (“density isomers”) in fast collisions of heavy nuclei, the dependence of the formation process on the bombarding energy and on the impact parameter. An experiment for the detection of such phase transitions in nuclear matter is suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408546
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Medium energy collisions of heavy nuclei in the three-dimensional nuclear fluid dynamical-(NFD) and Time-Dependent Hartree-Fock (TDHF) models (1980)
    Springer
    The European physical journal 294 (1980), S. 125-135 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study heavy ion collisions at bombarding energiesE LAB/n∼ 20–200 MeV within the three-dimensional NFD- and TDHF-models. A surprisingly good agreement between the results of the different models is found: The comparison phenomena occuring at these bombarding energies are quantitatively similar as a function of the bombarding energy as well as for various impact parameters. The formation of abnormal superdense nuclear matter (“density isomers”) is investigated in a schematic model for the nuclear equation of state. Again we find very similar results in the two models. Density isomers can be formed in high energy heavy ion collisions above a critical bombarding energy and below a critical impact parameter, which both depend on the details of the nuclear equation of state. Cross sections for the formation of density isomers are presented. An experiment for the detection of abnormal nuclear matter in fast, central heavy ion collisions is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01435047
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Fusion-fission, superheavy molecular-capture and symmetric fragmentation in 3D-TDHF calculations of the reactions238U,208Pb(4.6-8.0MeV/u)64Ni,48Ca (1982)
    Springer
    The European physical journal 306 (1982), S. 235-238 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In 3D-TDHF calculations of heavy asymmetric nuclear collisions we find four classes of reactions. At low impact parameters the system captures, whereas at large impact parameters deep inelastic collisions occur. For differentE Lab,L in and mass asymmetries this leads to(i) strong drift to symmetry with later fragmentation,(ii) formation of long-lived very-heavy nuclear molecules or(iii) fusion and slow drift to sphericity. The calculated capture cross-sections vs.E Lab are consistent with recent data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415125
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A three-center shell model for ternary fission (1979)
    Springer
    The European physical journal 290 (1979), S. 205-212 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We propose a generalization of the phenomenological shell model based on the harmonic oscillator potential with spin-orbit term andl 2-corrections to systems made up of three clusters. The centers of these may be in arbitrary geometrical configurations and the clusters may be of different masses. The method of determining the eigenstates of the single-particle Hamiltonian is sketched and results for the cluster structure of light nuclei and the ternary fission of a superheavy system are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408116
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  • 5
    Electronic Resource
    Electronic Resource
    Strong compression effects in fast nuclear collisions (1979)
    Springer
    The European physical journal 293 (1979), S. 173-179 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The importance of the impact parameter for compression effects and the reaction mechanism in high energy heavy ion collisions (HEHIC) are investigated within three-dimensional nuclear fluid dynamics. For central collisions of a small projectile (Ne) with a heavy target (U) a Mach shock wave is formed resulting in the sidewards emission of matter with azimuthally symmetric fragment distribution. At intermediate impact parameters the Highly-Inelastic Bounce-Off (HIBO) appears, where the large compression potential leads to the sidewards deflection of the projectile, which then explodes. A large collective transverse momentum transfer to the target leads to azimuthally asymmetric (180° correlated) fragment distributions. The deflection angles, energy losses, mean associated multiplicities as well as the maximum compression and thermal excitation of the system are calculated as a function of the impact parameter. A characteristic deflection function is obtained which may be used to determine the impact parameter in HEHI collisions experimentally. The influence of the nuclear equation of state is discussed. The strongly differing results of central reactions and those at intermediate impact parameter seem to have been observed in preliminary data of the GSI-Marburg-LBL collaboration. This is viewed as further indication for the occurrence of strong compression phenomena in nucleus-nucleus collisions of high energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01559758
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  • 6
    Electronic Resource
    Electronic Resource
    Pulsating blobs of quark matter in relativistic nuclear collisions (1980)
    Springer
    The European physical journal 295 (1980), S. 401-402 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The formation of hot, dense quark matter in violent high energy heavy ion collisions is discussed in a relativistic hydrodynamical model. Rapidly pulsating blobs of quark matter (treated in the bag model) are predicted to appear as a result of the expansive flow of the compressed quark matter against the contracting influence of confinement. The radial oscillations may result in pulsed matter emission.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412953
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Density as a constraint and the separation of internal excitation energy in TDHF (1985)
    Springer
    The European physical journal 320 (1985), S. 475-482 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a fast and efficient constrained Hartree-Fock iteration scheme which constraints the complete density distribution to remain constant. The scheme is particularly suited to a coordinate- or momentum-space representation. The technique is applied to separate the collective and the internal energy in a propagating TDHF state. We study the behavior of these two energies in an16O+16O collision.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415725
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  • 8
    Electronic Resource
    Electronic Resource
    Calculation of shape-isomeric-states with an extended Rotation-Vibration-Model (1981)
    Springer
    The European physical journal 301 (1981), S. 301-308 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We extend the Rotation-Vibration Model of Faessler and Greiner [1] assuming deformation dependent masses in the ansatz for the kinetic energy. With these additional terms we get a good description valid also for high deformations. The moment of inertia is well reproduced in both minima of the potential-energy surface. Shape-isomeric states, low energy levels and high-spin states are calculated for238U and compared with experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01421693
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  • 9
    Electronic Resource
    Electronic Resource
    The binding energy of 184 476 X in the droplet model (1985)
    Springer
    The European physical journal 321 (1985), S. 653-657 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.−k ; 21.10.Dr ; 21.10.Ft
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The positron spectrum emitted in the U-U-reaction at subthreshold energy could be interpreted in terms of the formation of a giant nucleus if the binding of the latter is 100 MeV stronger than predicted by the usual droplet model parametrisation. We analyse the extrapolation to giant nuclei by accounting properly for the error propagation when the parameters are fitted to measured binding energies and radii. The influence of higher order terms is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01432442
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  • 10
    Electronic Resource
    Electronic Resource
    Proton halos in100Sn using a relativistic shell model (1994)
    Springer
    The European physical journal 350 (1994), S. 91-92 
    Details
    ISSN: 1434-601X
    Keywords: 21.60C ; 21.10D ; 27.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The isotope100Sn was produced recently by nuclear fragmentation of124Xe projectiles at 1095 A MeV using FRS at the heavy-ion synchrotron SIS at the GSI and by using a112Sn beam delivered to the LISE by the GANIL cyclotron. We report the first relativistic calculation of this doubly magic nucleus100Sn. The calculations are based on the relativistic mean field model (RMF) which represents a relativistic shell model description of finite nuclei. We demonstrate that the doubly-magic nucleus100Sn is an excellent tool for testing the nuclear shell model close to the proton drip line. A clear proton halo is predicted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290673
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