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  • 1990-1994  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Effective boson number calculations in Mo and Cd isotopes (1990)
    Springer
    The European physical journal 335 (1990), S. 271-278 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.Ev
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effects of the neutron-proton interaction on the low-lying levels of Mo and Cd isotopes have been considered in the frame of the IBA-1 model by taking into account an effective boson number (N eff). Both an empirical procedure based on previous IBA-2 mixing calculations and theN p N n scheme provide comparableN eff values. Level spectra and electromagnetic transitions are investigated. The results support the idea that IBA-1 calculations with a suitableN eff can largely simulate IBA-2 mixing calculations, taking advantage of simplicity and a smaller number of parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304705
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nuclear level densities below 40 MeV excitation energy in the mass regionA ≃ 50 (1990)
    Springer
    The European physical journal 335 (1990), S. 299-313 
    Details
    ISSN: 1434-601X
    Keywords: 25.40. Fq ; 27.40 ; 21.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Consistent pre-equilibrium emission and statistical model calculations of fast neutron induced reaction cross sections are used to validate nuclear level densities for excitation energies up to 40 MeV in the mass regionA ≃50. A “composed” level density approach has been employed by using the back-shifted Fermi gas model for excitation energies lower than 12 MeV and a realistic analytical formula for higher excitations. In the transition region from the BSFG model range to that of full applicability of the realistic formula, an interpolation between the predictions of the two models is adopted. The interpolation rule, suggested by microscopic level density calculations, has been validated through the comparison of the calculated and experimental cross sections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304709
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    IBFM for Ba isotopes and chaoticity (1992)
    Springer
    The European physical journal 343 (1992), S. 139-143 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ma ; 24.60.Ky ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fluctuation properties have been analysed for the energy levels predicted by IBFM calculations in the Ba isotopes121Ba to131Ba. The results indicate, in general, a situation which is close to the chaotic limit. For the lighter isotopes studied (121 and 123), a phase transition is obtained in the low-spin, positive parity states, from a situation close to regularity at low excitation energies, towards chaoticity at higher excitations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291818
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Shape change and shape coexistence in134Pr (1992)
    Springer
    The European physical journal 344 (1992), S. 227-228 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Lv ; 27.60.+J
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The band structure of doubly odd nucleus134Pr has been studied by means of the reaction119Sn(19F,4n) at 87 MeV bombarding energy. Rotational bands built on πh11/2⊗vh11/2 and πh7/2⊗vh11/2 configurations has been observed. A band consisting of quadrupole transitions, probably involving the vi13/2[600]1/2+ orbital was also weakly populated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291710
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    Paper (German National Licenses)
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