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  • 1
    Electronic Resource
    Electronic Resource
    Application of the statistical model to the light heavy-ion system6Li +6Li (1990)
    Springer
    The European physical journal 335 (1990), S. 183-198 
    Details
    ISSN: 1434-601X
    Keywords: 24.60.Dr ; 25.70.Gh
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Reactions between6Li and6Li were studied in the laboratory energy range of 2–16 MeV. Angular distributions and excitation functions were measured for various proton, deuteron, triton andα-channels. In addition excitation functions were obtained for five γ-transitions in10B and the ground-state transitions in both7Li and7Be. Detailed statistical model calculations were performed under various assumptions concerning the formation of the compound nucleus. It is concluded that a smooth cutoff of the entrance channel angular momenta yields the only consistent description for both angular distributions and excitation functions. Only a few proton channels are dominated by compound nucleus decay. All other channels reflect the complex structure of6Li which causes a variety of direct reaction modes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294473
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Investigation of the isospin-forbidden reaction6Li(6Li,d 2)10 B 0+,1 (1993)
    Springer
    The European physical journal 346 (1993), S. 173-179 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Hw ; 24.60.Dr ; 25.70.Ef,Gh ; 27.20.+n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Angular distributions of the isospin-forbidden reaction6Li(6Li, d2)10 B 0+,1 were measured at six beam energies in the range from 3 to 8 MeV. The contribution of two-step transfer mechanism to the reaction under consideration was found to be negligible. Hauser-Feshbach model cross sections, obtained with parameters derived from a previous analysis of isospin-allowed reactions in the6Li +6Li system are consistent with the data, provided a 2% reduction factor reflecting isospin mixing of compound nucleus levels. From this factor an isospin-breaking matrix element of 〈H c 2 〉1/2≈13 keV was deduced. The presence of one broad or several resonances with (J P ,T)=(1−, 1) or (2−,1) concentrated at an excitation energy of about 30.3 MeV in12C seems to be responsible for the observed shape of angular distributions and their energy dependence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01306075
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Light charged particle decay in the reaction7Li+16O (1995)
    Springer
    The European physical journal 351 (1995), S. 43-58 
    Details
    ISSN: 1434-601X
    Keywords: 24.60.Dr ; 25.70.Gh
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Angular distributions and excitation functions for the emission of a large number of proton, deuteron, triton, andα-particle groups in7Li+16O reactions have been measured in the vicinity of the Coulomb barrier. Within the framework of the statistical reaction model, two approaches are presented that can reproduce the only weakly anisotropic shape of the angular distributions and the absolute cross section for those groups of ejectiles where contributions from direct reaction modes are small. When a standard Woods-Saxon potential deduced from elastic scattering is used, the entrance channel angular momentum distribution must be limited to values below critical angular momental cr which are smaller than the grazing angular momental gr if fusion is to be described. A global proximity potential with a parameter set that has been adjusted to reproduce the fusion reactions of a variety of p- and sd-shell nuclei yields very similar results when applied to7Li+16O. The proximity potential effectively introduces a similar angular-momentum limitation. This analysis proves the existence of a fusion cross section limitation and the importance of strong direct reaction modes (transfer and possibly inelastic processes) in7Li+16O reactions at energies close to and even below the Coulomb barrier. Another aspect of7Li+16O is addressed briefly. The resonance-like structure observed in the heavy-ion radiative capture reaction7Li(16O,γ 0+1)23Na atE x (23Na)=25.4 MeV is not observed in the particle decay channels investigated in the present work.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292785
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    Paper (German National Licenses)
    Fulltext
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