Communication Dans Un Congrès The European physical journal. A, Hadrons and Nuclei Année : 2005

Reaction cross-sections and reduced strong absorption radii of nuclei in the vicinity of closed shells N = 20 and N = 28

M. Benjelloun
  • Fonction : Auteur
D. Baiborodin
  • Fonction : Auteur
W. Catford
  • Fonction : Auteur
M. Chartier
  • Fonction : Auteur
Z. Dlouhy
  • Fonction : Auteur
A. Gillibert
  • Fonction : Auteur
D. Hirata
  • Fonction : Auteur
A. Lépine-Szily
  • Fonction : Auteur
Y. Penionzhkevich
  • Fonction : Auteur

Résumé

Energy integrated reaction cross-section measurements of around sixty neutron-rich nuclei covering the region of closed shells N = 20 and N = 28 were performed at intermediate energy (30-65 A . MeV) using direct method. In this experiment, silicon detectors were used as active targets. The reduced strong absorption radii, r02, for 19 new nuclei ($^{27}$F, $^{27,30}$Ne, $^{33}$Na, $^{28, 34-35}$Mg, $^{36-38}$Al, $^{38-40}$Si, $^{41-42}$P, $^{42-44}$S and $^{45}$Cl) are deduced for the first time. An additional 60 radii, also measured in this experiment, are compared to results from literature. A new quadratic parametrization is proposed for the nuclear radius as a function of the isospin in the region of closed shells N = 8 and N = 28. According to this parametrization, the skin effect is well reproduced and anomalous behaviour on the radii are observed in $^{23}$N, $^{29}$Ne, $^{33}$Na, $^{35}$Mg, $^{44}$S, $^{45}$Cl and $^{45}$Ar nuclei.

Dates et versions

in2p3-00024445 , version 1 (27-07-2005)

Identifiants

Citer

A. Khouaja, A.C.C. Villari, M. Benjelloun, G. Auger, D. Baiborodin, et al.. Reaction cross-sections and reduced strong absorption radii of nuclei in the vicinity of closed shells N = 20 and N = 28. 4th International Conference on Exotic Nuclei and Atomic Masses ENAM 2004, Sep 2004, Pine Mountain, United States. pp.223-226, ⟨10.1140/epjad/i2005-06-185-x⟩. ⟨in2p3-00024445⟩
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