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  • 1980-1984  (3)
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Material
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  • 1
    Electronic Resource
    Electronic Resource
    Short range behaviour of the N-N potential within the quark Model (1980)
    Springer
    The European physical journal 294 (1980), S. 173-181 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The short range behaviour of the nucleon-nucleon (NN) potential is studied in terms of the quark model, where nucleons are assumed to consist of three colored quarks. By considering the overlap kernel of the wave function of the resonating group method (RGM), it is found that the Pauli effect does not produce a ‘hard core’. Instead, the gluon exchange interaction with the confinement requirement suggests a rather soft one. TheΔ-Δ isobar interaction is also considered. In the (S, T) = (3, 3), (3, 2) and (2, 3) channels we find a ‘hard core’, while calculations in some other cases indicate even strong short range attractions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01435053
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The tensor force in heavy nuclei: High momentum collectivity of unnatural parity excitations (1980)
    Springer
    The European physical journal 295 (1980), S. 187-195 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The possibility of collectivity at high momentum transfer in unnatural parity states in finite nuclei, is outlined. This phenomenon is produced by the strong tensor force in the one pion exchange interaction operating coherently in a large oscillator space. The collectivity is observed at momentaq∼(2-3)m π corresponding to the critical momentum of pion condensation. If existent, such collective behaviour is expected to be seen in differential cross sections, e.g. for proton inelastic scattering, leading to unnatural parity states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01413076
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Quenched magnetic transitions from high spin states in light nuclei (1983)
    Springer
    The European physical journal 312 (1983), S. 247-249 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Recent investigations of stretchedM 6 transitions in thes-d shell have uncovered the unexpected systematic trend that isoscalarM 6 transitions are two to three times more retarded than the isovector ones. We present the result of a microscopic calculation analyzing the different mechanisms usually invoked in the formation of the quenching and suggest that an additional argument based on the difference in structure between isoscalar and isovector transition densities may be playing a predominant role in explaining the data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412167
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    Paper (German National Licenses)
    Fulltext
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