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  • 1
    Electronic Resource
    Electronic Resource
    The effect of nuclear and Coulomb interactions on the nuclear shapes of two colliding208Pb nuclei (1988)
    Springer
    The European physical journal 330 (1988), S. 417-421 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.−z ; 27.80.+w
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using a complex energy density functional derived from the Reid soft-core potential, the changes in nuclear shapes of two colliding208Pb are investigated. At each separation distanceR, the total binding energy of the Pb + Pb system is minimized w.r.t. the quadrupole deformation and diffuseness parameters of nuclear densities. It is found that the nuclear shapes are strongly affected by the nuclear and Coulomb interactions. A sudden transition occurs from oblate to prolate shapes around R16.8fm and a smooth one from prolate to oblate shapes aroundR≃11.76 fm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290127
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Competition betweenβ +- andβ −-decays from the transitional nucleus74As (1988)
    Springer
    The European physical journal 331 (1988), S. 287-294 
    Details
    ISSN: 1434-601X
    Keywords: 23.40 ; 21.10
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A theoretical study of theβ +- andβ −-decays of the74As nucleus is performed. Both non-relativistic and relativistic formfactor coefficients are calculated in the framework of the asymmetric rotor model with admixtures of two quasiparticles for transitional nuclei. The induced interactions are shown to have small contributions to the values of the formfactor coefficients in this case. The theoretical results for the principal observables are in good agreement with the experimental data in the case of the beta decays to the 2+ final states. The failure in describing the beta observables corresponding to the transitions to the ground states points to the existence of a more complex structure of the 0+-states in the daughter nuclei74Se and74Ge.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01355598
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  • 3
    Electronic Resource
    Electronic Resource
    Nuclear shapes and interaction potentials of two colliding208Pb nuclei at finite temperature (1989)
    Springer
    The European physical journal 333 (1989), S. 153-162 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Gv ; 24.10.Ht ; 27.80.+ w
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of nuclear and Coulomb interactions on the shapes of two colliding208Pb nuclei at finite temperature is investigated. The complex potential energy density derived by Faessler and collaborators and the kinetic energy density and entropy density for two Fermi spheres at finite temperature are used to calculate the free energy of the208Pb +208Pb system in the energy density formalism. Shell corrections are added to the free energy in the framework of the Strutinsky method. The total free energy is minimized with respect to the quadrupole deformation and the diffuseness to determine the density distribution of208Pb nucleus at certain distanceR and temperatureT assuming the deformed Woods-Saxon shape for each nucleus. It is found that the nucleus acquires larger deformation and diffuseness as the temperature increases. The interaction potential between two208Pb nuclei is calculated from the minimized free energy. The total (nuclear + Coulomb) potential is found to decrease with increasing temperature, whereas the real part of the nuclear potential becomes more repulsive as the temperature increases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01565146
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  • 4
    Electronic Resource
    Electronic Resource
    Inclusion of the Δ resonance in the optical potential between two nuclei and its application to medium energy12C-12C scattering (1988)
    Springer
    The European physical journal 329 (1988), S. 89-102 
    Details
    ISSN: 1434-601X
    Keywords: 21.65.+f ; 24.10.Ht ; 25.70.Cd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An energy dependent complex optical potential between two nuclei is calculated from the potential energy density for two colliding nuclear matters generated by solving the Bethe-Goldstone equation in whichNΔ and ΔΔ channels are explicitly coupled to theNN channel. By adding the contributions from the third and fourth order ring diagrams and the relativistic correction to the calculated potential energy density, the saturation property of a nuclear matter is reasonably well reproduced. This is used together with the kinetic energy density to calculate the optical potential for the12C+12C system in the energy density formalism with the local density approximation. The surface correction term and the symmetry energy term in the energy density functional are determined to reproduce the observed binding energy and the rms radius of12C. Using this potential, the differential cross sections for elastic12C-12C scattering atE lab=1440 and 2400 MeV are calculated and compared with recent experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294819
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Finite meson size effects in nucleon-nucleon phase shifts (1986)
    Springer
    Czechoslovak journal of physics 36 (1986), S. 325-327 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01597169
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  • 6
    Electronic Resource
    Electronic Resource
    A possible splitting of the isovector vibrational state due to triaxiality (1986)
    Springer
    The European physical journal 324 (1986), S. 235-239 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.Ev ; 27.70.+q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A microscopic calculation of the restoring force for isovector scissor vibrations using the wave functions of a triaxial Woods-Saxon potential shows that the experimentally observed splitting of the isovector M1 state in164Dy(50keV),168Er(70keV) and174Yb(200keV) could be attributed to the presence of a possible small non-axially symmetric deformation (γ=0.8°, 1° and 3° respectively).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01325134
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    Paper (German National Licenses)
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