Abstract

GOMEZ CAMACHO, A.  and  AGUILERA, E.F.. Simultaneous description of elastic, fusion and total reaction cross sections for the ⁶He +²⁰⁹ Bi system for energies around the coulomb barrier. Rev. mex. fis. [online]. 2004, vol.50, n.3, pp.265-271. ISSN 0035-001X.

A systematic and simultaneous description of elastic scattering, reaction and fusion cross sections for the system ⁶ He +²⁰⁹ Bi at energies below the Coulomb barrier is given within the direct reaction theory. Woods-Saxon optical potentials are used in the calculations where a cut-off parameter R_F is defined to separate the fusion and direct reaction absorption processes. A χ² - search for energy dependent forms for the diffuseness parameter α_I and the radial parameter R_I of the imaginary potential W_α that best fits the experimental data is carried out. Good fits to the data are found. A relationship between the large values found for α_I and R_I with the large spatial extension of the halo nucleus ⁶ He wave function is also looked for.

Keywords : Nuclear reactions; exotic nuclei; nuclear fusion.

        · abstract in Spanish     · text in English     · English ( pdf )