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  • 1990-1994  (6)
  • 1
    Electronic Resource
    Electronic Resource
    Effect of cup geometry and the presence of cement on acetabular component fixation (1992)
    Springer
    Archives of orthopaedic and trauma surgery 111 (1992), S. 301-304 
    Details
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two series of implanted conical, polyethylene Ring cups were studied clinically and radiographically. In one series the cups were uncemented while in the second cement was used. The results using cemented conical cups were then compared with results using a cemented cup of hemispherical design to study the effect of cup geometry. At 7–8 years a total of 3.8% of the cemented conical series and 2.9% of the uncemented were revised for aseptic loosening. At 9 years survivorship was identical. Migration of the sockets occurred in approximately 25% of both series and was directly related to cup cover of less than 80% (P 〈 0.001). The series of cemented hemispherical cups were reviewed after an identical period. Although the numbers revised for loosening were comparable in this and the cemented conical group, radiological migration was statistically greater in the latter (P 〈 0.001). Alternative methods of socket preparation and cement technique were thought to be the most likely explanation for the observed differences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00420054
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Neutron halo in lithium nuclei: A relativistic mean-field approach (1991)
    Springer
    The European physical journal 340 (1991), S. 119-124 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ft ; 21.60.Jz ; 27.20.+ n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Relativistic mean-field calculations have been carried out for Li isotopes using the non-linear Lagrangian parameter set NL2. Both spherically symmetric and axially deformed cases are considered. The binding energies, charge, neutron and matterrms radii, one and two neutron separation energies have been calculated. The results are discussed and compared with the available non-relativistic mean-field results, with special reference toneutron halo in the recent experimental observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01303823
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The spin-orbit field in superdeformed nuclei: a relativistic investigation (1991)
    Springer
    The European physical journal 339 (1991), S. 81-90 
    Details
    ISSN: 1434-601X
    Keywords: 2160.Ev ; 21.60.Jz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Relativistic Mean Field (RMF) theory is used to investigate the behavior of the spin orbit potential,V ls, in nuclear states of very large deformation and high angular velocity. As a by-product we present a set of parameters for an approximation of the relativistic scalar- and vector-potentialsS andV in the Dirac equation in terms of Saxon-Woods shapes. These reproduce more or less the same single particle specta as a full selfconsistent relativistic mean field calculation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01282936
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Relativistic field theory of superfluidity in nuclei (1991)
    Springer
    The European physical journal 339 (1991), S. 23-35 
    Details
    ISSN: 1434-601X
    Keywords: 21.30.+y ; 21.65.+f
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Starting from a Lagrangian with nucleonic and mesonic degrees of freedom, a relativistic theory of pairing correlations in nuclei is presented. Based on an extended mean field approximationDirac-Hartree-Fock-Bogoliubov equations are derived, which contain apart from the kinetic term of Dirac and the self-consistent mesonic fields, known from relativistic mean field theory, a Fock term and a pairing potential. This theory is applied to a relativistic description of pairing correlations in symmetric nuclear matter. Several phenomenological models are investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01282930
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Projected Tamm Dancoff theory for diabolical pair transfer in rotating nuclei (1991)
    Springer
    The European physical journal 339 (1991), S. 51-62 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.Ev ; 25.70.Cd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Angular momentum projected Tamm Dancoff theory in a realistic configuration space is used to investigate the occurrence of diabolical points and the connected Berry phase in the rotational spectra of well deformed Yb- and Hf-nuclei. Specific nuclei are predicted, where we expect diabolic pair transfer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01282933
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Nuclear rotational population patterns in heavy-ion scattering and transfer reactions (1991)
    Springer
    The European physical journal 339 (1991), S. 141-145 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.Cd ; 27.90.+b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A model of239Pu with decoupled neutron is used for theoretical calculations of rotational population patterns in heavy ion inelastic scattering and one-neutron transfer reactions. The system treated is90Zr on239Pu at the near-barrier energy of 500 MeV and backscattering angles of 180° and 140°. The influence of the complex nuclear optical potential is seen to be very strong, and the Nilsson wave function of the odd neutron produces a distinctive pattern in the transfer reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01282943
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    Paper (German National Licenses)
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