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  • 1990-1994  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    The statistical theory of nuclear reactions in the limit of isolated resonances II (1990)
    Springer
    The European physical journal 335 (1990), S. 293-298 
    Details
    ISSN: 1434-601X
    Keywords: 24.60.Dr
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The random Hamiltonian theory of statistical nuclear reactions is considered in the limit of isolated resonances which means small transmission coefficientsT e in all open channelse. This generalizes the result of an earlier paper — restricted toT e =T for alle. A numerical example shows that the present approximation is valid even for unexpectedly large values of theT e . Thus the formula for the compound nucleus cross sections derived below seems to provide a useful approximation to the exact expression over a large range of possible cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304708
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Symmetry breaking in statistical nuclear reactions: are two-state-models useful? (1990)
    Springer
    The European physical journal 337 (1990), S. 29-37 
    Details
    ISSN: 1434-601X
    Keywords: 24.60.-k
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An interesting feature of compound nucleus reactions is that they enhance violations of fundamental symmetries (parity and time reversal). This fact has repeatedly been pointed out in the framework of a two-resonancemodel. Two resonances — isolated from all others — do not exist in nuclei. Here, this objection is investigated in a statistical sense. It is shown that the two-level-model yields results that are partly identical, partly quite similar to those from the multi-level-model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01283935
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Isospin mixing matrix elements extracted from isobaric analog resonances (1990)
    Springer
    The European physical journal 337 (1990), S. 121-129 
    Details
    ISSN: 1434-601X
    Keywords: 11.30.Et ; 24.30.Eb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A compilation of isospin mixing matrix elements is provided. We restrict ourselves to results extracted from the analysis of isolated isobaric analog resonances. This amounts to collecting the published spreading widths of the resonances. A theoretical part has been added in order to make the present paper self-consistent: The spreading width is defined, the distinction between its external and internal parts is explained and the approximations are discussed that allow the extraction of the spreading width from experiment. It turns out that the spreading width does not depend on the level density of the fine structure into which the isobaric analog resonance is embedded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294282
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The statistical theory of nuclear reactions in the limit of isolated resonances III (1990)
    Springer
    The European physical journal 337 (1990), S. 465-466 
    Details
    ISSN: 1434-601X
    Keywords: 24.60.Dr
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In two earlier papers, the statistical theory was considered in the limit of isolated resonances. The calculated quantity was essentially the compound nucleus cross section. Here, we complete those considerations with the correlation betweenS-matrix elements taken at different energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294984
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    Paper (German National Licenses)
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