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  • 24.10.−i  (2)
  • 23.90.+w Other topics in radioactive decay and in-beam spectroscopy  (1)
  • 25.70.Np  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Emission of unbound 8Be and 12C * (0+2) clusters in compound nucleus reactions (2005)
    Springer
    The European physical journal 23 (2005), S. 19-31 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.60.Gx Cluster models ; 23.90.+w Other topics in radioactive decay and in-beam spectroscopy ; 25.70.Gh Compound nucleus ; 25.70.Pq Multifragment emission and correlations
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. We have studied the emission of light unbound clusters, 8Be and 12C * (0+2), in the reactions 18O + 13C →{31} Si →{23} Ne + 8Be and 28Si + 24Mg →{52} Fe →{40} Ca + 12C * (0+2). The γ-ray spectra obtained in coincidence with 8Be and 12C * (0+2) emission have been studied relative to the statistical emission of two or three α-particles. The angular-momentum-to-energy balance of the cluster emission is compared with that of multiple-α emission. The properties of the energy spectra of the binary process and the population of the residual nuclei by cluster emission are discussed. It is observed that cluster emission carries away less excitation energy on average than the sequential emission of the individual components.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1140/epja/i2004-10071-3
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  • 2
    Digitale Medien
    Digitale Medien
    Refractive scattering and the nuclear rainbow in the interaction of12, 13C with12C at 20MeV/N (1985)
    Springer
    The European physical journal 322 (1985), S. 241-261 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 24.10.−i ; 25.70.Cd
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The elastic and inelastic scattering and the neutron transfer have been measured for the systems12C +12C and13C +12C at 20MeV/N up to θcm= 60° with theQ3D -spectrometer. The angular distributions of the elastic scattering show an enhanced cross section at angles larger than 40°. It can be identified as refractive scattering with the clear signature of a nuclear rainbow.L-cut-off calculations show that these contributions come fromL-values which are significantly lower than the grazingL-value. The deflection function has a broad minimum in thisL-range which is typical for rainbow scattering. TheS-matrix is decomposed by a phenomenological parametrization into a refractive and a diffractive part. The interference of these amplitudes plays an important role in the rainbow enhancement. The spatial localization of the refractive scattering is deduced from the turning points of the corresponding trajectories; a localization between 2.5 fm and 4 fm is found. Semi-classical calculations with complex trajectories in the single-turning-point approximation show good agreement with the quantummechanical calculations. Refractive contributions are not observed in the inelastic scattering. This can be explained by reducing the strength of the conventional collective form factor in the internal region. In contrast to this the enhancement at large angles is seen in the one-neutron transfer channels where the refractive scattering is dominant. This is the first observation of such contributions to heavy-ion transfer reactions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01411889
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  • 3
    Digitale Medien
    Digitale Medien
    Cold multi-nucleon transfer between heavy nuclei and the synthesis of new elements (1992)
    Springer
    The European physical journal 342 (1992), S. 177-182 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 24.10.−i ; 25.70.CD
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Experimental results of multi-nucleon transfer reactions on very heavy targets (208Pb,235U,248Cm) are analysed with respect to their properties as cold quasielastic reactions. Optimum conditions for quasi-elastic transfer are discussed for the production of very heavy elements.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01288466
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  • 4
    Digitale Medien
    Digitale Medien
    Transfer and fragmentation reactions of14N at 60 MeV/u (1990)
    Springer
    The European physical journal 337 (1990), S. 425-437 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.70.Np ; 25.70.Cd
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Inclusive energy spectra and cross sections of reaction products close to the14N projectile (11C,12C,13C,15N and15O) have been measured in the angular rangeθ L =1.2°–4.2° at an incident energy of 60 MeV/u for five different target nuclei (12C,27Al,58Ni,90Zr and208Pb). Two components are found to be systematically present in the energy spectra of the carbon isotopes, the first similar to that observed at relativistic energies and the second shifted down in energy characteristic for a very dissipative process. The dependence of the differential and integrated cross sections on the target mass indicates that the two-body final channels (14N,13C), (14N,15N) and (14N,15O) are strongly correlated to the fragmentation channels.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294980
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