Speaker
Description
The study of nuclei out of the line of stability has been one of the main fields of research in low energy nuclear physics [1]. Light exotic nuclei such as 6He, 11Be, 11Li, 8B and others are produced in laboratory [2-4] and present new interesting phenomena such as the Borromean structure and the neutron and proton halos [5]. Nuclei like 7Be [6] and 8Li are not so exotic, however, may have much interest in both, nuclear structure and in nuclear astrophysics aspects [7]. The synthesis of heavy elements in stars, has to overcome the mass gaps A=5 and A=8 for which there are no stable elements. For A=8 there are two bound nuclides, 8Li and 8B, which are mirror nuclei, and have half-lifes of arround 800 ms. The presence of these nuclei in stars could affect the nucleosynthesis of heavy elements up to 12C. In addition, nuclear data about nuclei A=8 is very scarce. This work propose measurements of 8Li elastic scattering on several targets: 9Be, 27Al, 58Ni, and 120Sn at laboratory energies from 16 to 32 MeV. Elastic scattering angular distributions at these energies will provide information about the nuclear potential. The interplay between Coulomb and nuclear effects can be investigated, as a function of the target mass. In addition, measurements with the light target 9Be may provide important spectroscopic information of the proton transfer reaction 9Be(8Li,9Be). The measurements will be performed at University of Sao Paulo, using the 8Li beam produced by the RIBRAS (Radioactive Ion Beams in Brasil) facility [8].
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