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  • Articles: DFG German National Licenses  (2)
  • 25.70.-z  (1)
  • 25.70.Pq  (1)
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  • Articles: DFG German National Licenses  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Percolation and fragmentation of excited atomic nuclei (1995)
    Springer
    The European physical journal 353 (1995), S. 279-287 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.−Z ; 25.70.Pq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present an analysis which aims at explaining the similarities (and differences) which exist between a simple bond percolation process on a cubic lattice and the fragmentation of highly excited atomic nuclei. Emphasis is placed on discussing percolation in terms of concepts which are well known in nuclear physics such asQ-value and particle emission thresholds. Similarities and differences between the bond percolation process and nuclear fragmentation are discussed. An approximate expression for the microcanonical partition sum (number of microstates) corresponding to any given percolation partition is shown to provide a good starting point for predicting fragment size distributions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292333
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Light-particle emission versus evaporation residue formation in collisions of40Ar onnatCa at 30 MeV/u (1993)
    Springer
    The European physical journal 347 (1993), S. 117-122 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.-z
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The closely associated phenomena of preequilibrium emission and evaporation residue formation in fusion-like reactions were studied in central collisions between40Ar andnatCa at 30 MeV/u. Heavy reaction products were taken in coincidence with neutrons and light charged particles. The preequilibrium neutron data agree very well with predictions of a quantal phase-space model which, in addition to the mean field, takes two-body collisions properly into account. Preequilibrium emission ends in thermally equilibrated hot nuclei with an average excitation energy of about 6 MeV/u. The combined results show a striking interrelation between the ‘missing mass’ and light-particle multiplicities: the mass difference between the full compound mass and the observed residues can be explained quantitatively by the emission of only neutrons and light charged particles withZ≦2 during the entire course of energy dissipation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284678
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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