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Fine structure of the isoscalar giant quadrupole resonance inSi28andAl27
Usman, I. T.,Buthelezi, Z.,Carter, J.,Cooper, G. R. J.,Fearick, R. W.,Fö,rtsch, S. V.,Fujita, H.,Fujita, Y.,von Neumann-Cosel, P.,Neveling, R.,Papakonstantinou, P.,Pysmenetska, I.,Richter, A.,Roth American Physical Society 2016 Physical Review C Vol.94 No.2
<P>The isoscalar giant quadrupole resonance in Si-28 and Al-27 has been investigated with high-energy-resolution proton inelastic scattering at E-p = 200 MeV and at scattering angles close to the maximum of Delta L = 2 angular distributions with the K600 magnetic spectrometer of iThemba LABS, South Africa. Characteristic scales are extracted from the observed fine structure with a wavelet analysis and compared for Si-28 with random-phase approximation and second random phase approximation calculations with an interaction derived from the Argonne V18 potential by a unitary transformation. A recent extension of the method to deformed nuclei provides the best description of the data, suggesting the significance of Landau damping.</P>