Experimental determination of the nuclear density of 6,7Li nuclei / Determinação experimental da densidade nuclear dos isótopos 6,7 Li

AUTOR(ES)

Derberson Pereira de Sousa

DATA DE PUBLICAÇÃO

2008

RESUMO

In this work, the elastic and quasi-elastic cross sections for the systems 6,7Li +120 Sn, for the near barrier energies, ELAB = 25.0; 20.5 and 19.5 MeV, have been measured. The data have been analyzed in the framework of the parameter free São Paulo potential, which takes in account the non-local exchange effects in first order. From the quasi-elastic data analysis, the experimental nuclear densities in the surface region for the weakly bound nuclei 6,7Li have been extracted and compared with those from a systematic based on Hartree-Fock-Boguliobov calculations. The deviation for 7Li, was interpreted due to the projectile break-up and couplings to continuum effects. The elastic data description for both systems is in agreement with the recently reported break-up threshold anomaly.

ASSUNTO(S)

potential scattering densidade isótopos física nuclear nuclear physics espalhamento quase-elástico density

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