Large angle quasi-elastic scattering for the study of surface nuclear diffuseness of weakly

D.S. MONTEIRO; P.R.S. GOMES; D.R. OTOMAR; J. LUBIAN; E. CREMA; J.M.B. SHORTO; J.F.P. HUIZA; O.A. CAPURRO; G.V. MARTÍ; J.O. FERNÁNDEZ NIELLO; A.J. PACHECO; A. ARAZI; D. MARTÍNEZ HEIMANN; A. NEGRI; J.M. FIGUEIRA

São Sebastião, Brasil

Workshop; XXXI Reunião de Trabalho sobre Física Nuclear no Brasil,; 2008

Sociedade Brasileira de Física

In recent years, the quasi-elastic scattering data, at large angles and deep sub-barrier energies have been used to investigate the surface nuclear di®useness of the heavy ion nuclear potential. In these energies most of the reaction channels are closed and the cross sections are more sensitive to the surface region of the potential, so we can probe the surface di®useness of the Woods-Saxon form that ¯ts the data. Capurro et al. [1] studied systems with ZpZt " 780 and found a di®useness value around 0.60 fm. Monteiro et al. studying near spherical, but more light systems found a di®useness close to 0.70 fm. For deformed systems di®useness values around 1.0 fm are usually the best values founded to adjust experimental data. In this work we present an overview of this subject for the tightly bound systems 16, 17, 18O + 92Mo [2], weakly bound systems 6, 7Li + 144Sm [3, 4], and a super heavy system, 86Kr + 208Pb[5]. [1] Capurro et al., Phys. Rev. C 75 (2007) 047601 [2] Monteiro et al. Phys.Rev. C 76 (2007) 027601 [3] Ottomar et al. (2008), to be published [4] Monteiro et al. (2008), to be published [5] Monteiro, Gomes, Phys. Rev. C 77 (2008) 017601