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  • Artikel: DFG Deutsche Nationallizenzen  (4)
  • 25.70.Np  (3)
  • 25.85.Ca  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Incomplete deep-inelastic scattering in20Ne+197Au collisions at 20 MeV/nucleon (1988)
    Springer
    The European physical journal 330 (1988), S. 303-310 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70.Lm ; 25.70.Np
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Correlations between emission angles and energies of coincidentα-particle projectile-fragment pairs have been measured for the20Ne+197Au system at 390 MeV beam energy. Theα-particles observed close to the direction of the projectile-like fragment were found to result essentially from sequential projectile decay. Starting from the close-geometry data, the contribution of sequentially emittedα-particles was calculated by Monte Carlo simulations for the entire angular range. For deep inelastic events, the measured angular correlations exhibit a spectacular excess over the calculated correlation. This excess is centred close to the beam direction but on the opposite side of it with respect to the detected projectile-like fragment. The correspondingα-particles have velocities around 85% of the projectile velocity indicating emission in an early reaction phase.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294874
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Alpha particles from the reaction12C +12C at 28.7 MeV/nucleon (1991)
    Springer
    The European physical journal 338 (1991), S. 187-191 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70.Np ; 21.60.Gx
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A classical dynamical alpha-cluster model has been developed and applied in order to get inclusive energy spectra of alpha particles produced in the collision of12C +12C at the beam energy 28.7 MeV/A. Results of the calculations are compared with experimental data. The shapes of the experimental energy spectra and the absolute normalization at forward angles are approximately described without any free parameters. The model makes it possible to distinguish alpha particles originating from the compound system and from direct processes. The spectra at forward angles are dominated by projectile fragmentation processes. The cross section at larger angles is overestimated, which is partially due to emission of particles other than alpha particles in central collisions. The evaporation Hauser-Feshbach model predicts that alpha particles emitted from the compound nucleus constitute less than 26% of all emitted particles.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01284793
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Direct and damped fragmentation within the framework of the spectator-participant model (1990)
    Springer
    The European physical journal 337 (1990), S. 419-423 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70.Np
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Within the quasi free-reaction model apart from the conventional component of direct fragmentation we include also particles coming from the interaction of the socalled participant, part of the projectile, with the target. The model takes into account the momentum distribution of clusters in the projectile, the off-energy-shell cross section for a virtual two-body reaction and the phasespace factor. The last two factors have usually been neglected in studies of heavy ion fragmentation. The model has been applied to the description of inclusive energy spectra of particles produced in the12C+12C collision, measured at the energy of 85 MeV/A by the CERN-Copenhagen-Grenoble-Lund collaboration. With two parameters adjusted to the experimental data, the model describes the energy spectra at forward angles and predicts the slope of the experimental angular distributions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294979
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  • 4
    Digitale Medien
    Digitale Medien
    Polar light charged particles accompanying spontaneous fission (1989)
    Springer
    The European physical journal 333 (1989), S. 83-87 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.85.Ca
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Simple model of emission of light charged polar particles accompanying fission of heavy nuclei is presented. We assume the emission from the whole surface of fragments after scission, taking into account the influence of the accompanying fragment. The initial energy and time of emission are treated phenomenologically. The motion of light particles and fission fragments are subsequently calculated in the framework of classical dynamics. We get a good agreement with experimental data if we assume a prompt emission. The possibility of the connection with giant resonances is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01290113
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