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  • 25.70.Jj  (3)
  • 1
    Digitale Medien
    Digitale Medien
    Multifragmentation of excited nuclei within a schematic hydrodynamical and percolation picture (1987)
    Springer
    The European physical journal 328 (1987), S. 101-113 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70-z ; 25.70.Np ; 25.70.Gh ; 25.70.Jj ; 05.90.+m
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We present a simple model to describe the evolution of hot and compressed nuclei. It is based on irrotational hydrodynamics and a 3-dimensional site-bond percolation model. Hydrodynamics is used if the evolution of the system is dominated by the mean field. This situation occurs when the fluctuations of the mean field are small. These latter are evaluated using the percolation model. In some cases it turns out that these fluctuations become very large and the system breaks up into several pieces (multifragmentation). The results of this process are described by the percolation model. We have obtained analytical or fitted expressions for all the results which compare well with those obtained in a previous and more involved model based on the same physical ideas. In particular we found that a noncompressed nucleus undergoes multifragmentation if the thermal excitation energy is larger than 70% of its binding energy. If the nucleus is compressed this value is notably decreased.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01295187
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  • 2
    Digitale Medien
    Digitale Medien
    Multifragmentation of hot and compressed nuclei within a time dependent thomas fermi and percolation model (1986)
    Springer
    The European physical journal 325 (1986), S. 347-355 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70.−Z ; 25.70.Np ; 25.70.Gh ; 25.70.Jj ; 05.90+m
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have used a spherical time dependent Thomas Fermi model to study the expansion of hot and/or compressed nuclei. This approach was coupled to a site-bond percolation model to study the disassembly of the nucleus into many pieces (multifragmentation). We find that a non compressed nucleus undergoes multifragmentation if the thermal excitation energy is larger than 70% of its binding energy. If the nucleus is compressed this value is notably decreased.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294619
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  • 3
    Digitale Medien
    Digitale Medien
    A simple leading particle explanation for linear momentum transfer systematics (1986)
    Springer
    The European physical journal 325 (1986), S. 467-474 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70.Jj
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A simple formula based on leading particle models of nucleon-nucleon collisions is used to evaluate the average momentum transfer in central heavy ion collisions at energies from 20 to 150 MeV/u. This formula, which reproduces a number of the features of the observed systematics, offers a straightforward explanation for the approximate universality of fractional linear momentum transfer as a function of velocity, the dependence of fractional momentum transfer on target mass and the greater fractional momentum transfer of the proton as compared to heavy ion projectiles.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01290050
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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