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  • 24.10-i  (1)
  • 25.70.Jj  (1)
  • 27.40.+ z  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Total neutron multiplicities as a measure of the violence in heavy ion reactions (1992)
    Springer
    The European physical journal 342 (1992), S. 319-327 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70.Jj ; 25.85.Ge
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Energy spectra and multiplicities of neutrons from the reaction system 838 MeV32S projectiles on197Au have been measured in coincidence with binary fragmentations. Neutron detection was performed simultaneously in a 4π scintillator sphere and by time-of-flight. The linear momentum transfer (LMT) and the excitation energyE CN * are deduced with the folding angle technique. Neutron multiplicities are compared for consistency and discussed as a measure of LMT andE CN * . The saturation ofM 4π (E CN * ) beyondE CN * ≈400 MeV seen for several systems of high fissility (x≧0.8) is attributed to the spreading of the folding angle distribution and the increasing competition of charged particle evaporation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01291516
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Mass measurement and spectroscopy of57Cu with the58Ni(14N,15C)-reaction (1987)
    Springer
    The European physical journal 326 (1987), S. 139-146 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.Dr ; 25.70.Cd ; 27.40.+ z
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The mass of57Cu has been measured with the58Ni(14N,15C)-reaction at 150 MeV incident energy with theQ 3D-spectrometer. The reaction has been selected after a careful inspection of the DWBA-expression for the cross section with respect to the highest weighting factors for spins andl-transfer. Cross sections of several μb/sr have been obtained. TheQ-value has been measured to beQ 0=−19.90 (4) MeV and the57Cu mass excess is −47 340 (40) keV. Four lines of excited states have been observed up to 5.7 MeV. These states have a structure of single particle character, since57Cu consists of a doubly closed core with N=Z=28 and a proton outside, and states up to the 2d 5-shell are observed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01283588
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Pairing effects in nucleon transfer reactions in the system144Sm+88Sr at 4.7 MeV/u (1990)
    Springer
    The European physical journal 336 (1990), S. 71-89 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 24.10-i ; 25.70.Cd
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Proton and neutron transfer populating low-lying states have been studied in the system144Sm+88Sr at an energy below the Coulomb barrier. The experimental cross sections for the single proton transfer are well reproduced by DWBA-calculations using spectroscopic information from light ion reactions. The two-proton transfer appears enhanced relative to the uncorrelated sequential transfer of single protons. The same holds for the transfer of proton pairs, the enhancement is kept for the second pair. This is interpreted as a supercurrent between two superfluid nuclear proton-pair wave functions: more mass and charge is transported per time unit in pairs than by single nucleons. Neutron transfer is observed with large cross sections and is found to contribute to the energy loss observed in the transfer reactions. For mixed proton-neutron transfers the sequential nature of the transfer reactions is established in a similar way as for the two-proton and two-neutron transfer; in the latter case no enhancement is observed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01904165
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