DREB 2012 - Direct Reactions with Exotic Beams

Coulomb Excitation of 8Li on a 197Au Target

29 Mar 2012, 16:10

20m

Aula Magna, Faculty of SMFN

Talk Session 14

Speaker

Marlete Assunção (Universidade Federal de São Paulo)

Description

Current experimental values of the B(E2, 2+->1+) 8Li strongly disagree with theoretical estimates [1-3]. If confirmed this discrepancy would have a strong impact on nuclear models. We have measured inelastic scattering of 8Li (T1/2= 838 ms) on a 197Au target at Elab=26.9 MeV. Elastic scattering has been measured in parallel. The 8Li radioactive beam has been produced at the RIBRAS system (Brazilian Radioactive Ion Beam) from the 9Be(7Li,8Li)8Be reaction. The primary beam of 7Li (Elab = 30.7 MeV) has been extracted from the Pelletron/Linac Accelerator of the Institute of Physics of the University of São Paulo. Use has been made also of 197Au with thickness of 5.0mg/cm2. The angular distributions have been measured within a range of 20-75 degrees by making use of a detection system with four telescopes. Each telescope consisted of two silicon detectors with thicknesses of 20 and 1000 microns. Preliminary results will be presented. [1] J. A. Brown et al., Phys. Rev. Letts., 66, 19, 1991. [2] R. J. Smith et al., Phys. Rev. C, 43, 5, 1991. [3] P. Descouvemont and D. Baye, Phys. Letts. B 292, 235-238, 1992.

Presentation materials

Slides

dreb2012_massuncao_[modalità_compatibilità].pdf