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  • 1990-1994  (3)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Reduction method ofN-body equations (1992)
    Springer
    Few body systems 12 (1992), S. 201-215 
    Details
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract N-body equations of identical-particle systems are explicitly evaluated forN=3 toN=6. The formalism used is of the Faddeev-Yakubovsky type as derived from the so-called chain-of-partition-labeled approach by Cattapan and Vanzani. We compare the resulting equations with the ones from the multi-three cluster coupling model as given by Sawada et al. and establish an important relation between these two classes ofN-body equations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01074816
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Algorithm for solving the Faddeev equations in the three-body continuum under avoidance of moving logarithmic singularities (1994)
    Springer
    Few body systems 16 (1994), S. 165-175 
    Details
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new method is presented for solving the Faddeev equations in the three-body continuum, which avoids the moving logarithmic singularities present in momentum space methods used up to now. The new algorithm leads to a simple structure of the Faddeev integral kernel, what simplifies significantly the numerical realization. Its application in nuclear physics is, however, still plagued by the presence of the virtual-state pole in the nucleon-nucleon1S0 channel. Omitting that channel in calculations with the Bonn-B potential we demonstrate excellent agreement between three-nucleon observables obtained with the new and a former method. Since the codes are quite different, this can be considered as a convincing test.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01344396
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Application of the Alt-Grassberger-Sandhas equations to the three-alpha model (1994)
    Springer
    Few body systems 17 (1994), S. 185-197 
    Details
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The three-alpha model of the12C nucleus is calculated by solving the Alt-Grassberger-Sandhas (AGS) equations with effective cluster-cluster potentials directly derived from the resonating-group method and modified by the orthogonality-condition model or the fish-bone optical model techniques. Instead of using Kukulin's pseudo-potential projection method for the Pauliforbidden state, which is approximative but the only method used up to now, we introduce a new exact method to give the transition matrices. The dependence of the12C binding energy on the strength of Serber force is shown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01074451
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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