Elsevier

Nuclear Physics A

Volume 276, Issue 1, 17 January 1977, Pages 157-167
Nuclear Physics A

Evolution from deep inelastic transfer to quasi-fission

https://doi.org/10.1016/0375-9474(77)90164-6Get rights and content

Abstract

Recoil techniques have been used to study the evolution of the features of four-charge transfer reactions in 148Sm targets when the mass and energy of the projectile are varied. Beams of 63Cu and 56Fe were used, and their energies were chosen in order to be equal to 1.2B and 1.5B for both projectiles, B being the interaction barrier. The residual nuclei 149gTb, 150Dy and 151Dy were identified by their radioactive properties. This study has shown a continuous evolution of the characteristics of the c.m. angular distributions, especially the position of the maxima, from typical deep inelastic transfer to quasi-fission features, when the value of EB decreases. For equal values of this ratio, no difference was observed between Fe and Cu induced reactions. The c.m, energies corresponding to the maximum cross section increases when the incident energy is increased, for a given projectile. At low incident energies (igE = 1.2B), the relative motion appears to be completely damped, and the distance of the two nuclei after separation is equal to about 5 fm. At higher incident energies, the c.m. energy is significantly higher. This may mean that the relative motion is not completely damped. Part of the effect may be explained by the differences in the angular momenta involved in the reaction.

References (17)

  • A.G. Artukh et al.

    Nucl. Phys.

    (1973)
  • J. Galin et al.

    Nucl. Phys.

    (1975)
    L.G. Moretto et al.

    Nucl. Phys.

    (1975)
  • R. Bimbot et al.

    Nucl. Phys.

    (1974)
  • R. Bimbot et al.

    Nucl. Phys.

    (1975)
  • J. Pèter et al.

    J. de Phys. Lett.

    (1975)
  • K.L. Wolf et al.

    Phys. Rev. Lett.

    (1974)
  • J. Gay

    Rapport CEA R-40-60

    (1970)
  • J. Wilczynski

    Phys. Lett.

    (1973)
There are more references available in the full text version of this article.

Cited by (0)

CENBG Bordeaux-Gradignan, France.

View full text