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  • 1980-1984  (5)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Projectile break-up in continuous particle spectra from nuclear reactions induced by 156 MeV6Li (1980)
    Springer
    The European physical journal 296 (1980), S. 113-122 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The break-up of 156 MeV6Li ions colliding with12C,60Ni,90Zr,120Sn and208Pb has been experimentally studied. It was found that the break-up cross section decreases rapidly with increasing emission angles of the fragments and increases with increasing target mass. It comprises a fairly large fraction of the total reaction cross section. The observed features suggest that the6Li fragmentation is mainly a peripheral process, and is dominated by the cluster properties of the incident projectile. A simple plane-wave break-up model gives a rather good description of the shapes of the break-up bumps. The angular distributions of the fragments emitted in the6Li+208Pb reaction reveal the transition from peripheral break-up to incomplete fusion processes by which beam-velocity fragments are captured by the target nucleus. In addition to the (α+d) dissociation the (3He+t) break-up has been observed, but the triton spectra appear to be rather complex indicating further components due to more complicated reaction paths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412652
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fine- and hyperfine structure analysis of the odd configurations in the lead atom (1984)
    Springer
    The European physical journal 315 (1984), S. 137-144 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The fine- and hyperfine structure (hfs) analysis, on the basis of available experimental data for the configuration 6s 26p6d+6s 26p7s+6s 26p8s in PbI has been performed. The Slater integrals, spin-orbit parameters and the effective hfs one-electron parameters have been determined. We find an off-diagonal core-polarization effect in the 6p6d+6p7s-space. Using the calculated radial parameters, the values of the quadrupole moment for stable and radioactive Pb-nuclei have been determined from measuredB-factors of the 6p7s 3P1 state. In addition, a repulsion effect on the hfs sublevels with the same quantum numberF has been investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419372
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    104 MeV alpha particle scattering from90, 92Zr (1982)
    Springer
    The European physical journal 305 (1982), S. 351-357 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Differential cross sections have been measured for the elastic and inelastic scattering of 104 MeV alpha-particles from90, 92Zr. The experimental data are analyzed in terms of coupled channels on the basis of a flexible anharmonic vibrator model and using different parametrizations of the radial shape of the extended optical potential. The results favour the squared Saxon-Woods type for the real part. Additionally to a radial momentum analysis of the real potentials a semimicroscopic folding model has been applied for extracting isoscalar quadrupole and hexadecapole transition rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419085
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The density dependence of the effective alpha-nucleon force and isoscalar transition rates of nuclei (1984)
    Springer
    The European physical journal 316 (1984), S. 225-231 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Effects of the density-dependence of theα-particle-bound nucleon effective interaction on single-folding models of inelasticα-particle scattering are studied, in particular in view of corrections of the isoscalar transitions rates extracted by implicit folding procedures. Thel-dependent corrections factorsC l are calculated and tubulated for applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412267
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Optical potentials and isoscalar transition rates from 104 MeV alpha-particle scattering by the N=28 isotones48Ca,50Ti and52Cr (1983)
    Springer
    The European physical journal 313 (1983), S. 111-122 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Precisely measured differential cross sections for elastic and inelastic scattering from 104 MeV alpha-particles by48Ca,50Ti and52Cr are reported. The analyses aim primarily at the determination of strength, radial shapes and deformation of the scattering potentials, looking for isotonic differences ofN=28 isotones. The mean square radii of the (real) potentials are discussed in terms of mean square radius differences of the matter distributions. The isoscalar transition rates derived by coupled channel analyses of the measured cross sections are compared with electromagnetic rates. In addition to the analyses on the basis of a slightly generalized extended optical model a semi-microscopic deformed folding model has been applied, using a density-dependent effective alpha-bound nucleon interaction. Though an excellent description of the data over the full angular range is obtained the resulting values of the deformation parameters appear to be not consistent with results from various different methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02115849
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    Paper (German National Licenses)
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