Above-barrier fusion enhancement of proton-halo systems

• DOI: 10.1103/physrevc.93.034613
• Publication Date: 2016-03-21T07:37:00Z
• Authors: E. F. Aguilera; P. Amador-Valenzuela; E. Martinez-Quiroz; J. Fernández-Arnáiz; J. J. Kolata; V. Guimarães

Previously reported data for fusion of the $^{8}\mathrm{B}+(^{58}\mathrm{Ni},^{28}\mathrm{Si})$ systems are critically reviewed. New $\ensuremath{\alpha}\text{-particle}$ from $^{8}\mathrm{B}+^{58}\mathrm{Ni}$ also reported, but paper is mostly based on using realistic calculations well-established codes to reanalyze previous data. The influence breakup protons evaporation proton measurements heavier system found be small at all energies except lowest one measured, and corrections made this process. Possible model dependencies in deduced cross sections investigated three different codes. sets $^{58}\mathrm{Ni}$ $^{28}\mathrm{Si}$ targets shown consistent with each other enhancement up that greater than Coulomb barrier ${V}_{b}$ $({E}_{\text{c.m.}}\ensuremath{\lesssim}\phantom{\rule{4pt}{0ex}}{\mathrm{V}}_{b}+1.5\ifmmode\times\else\texttimes\fi{}\ensuremath{\hbar}\ensuremath{\omega})$. This limit corresponds 6.2 MeV above target. An important difference behavior neutron-halo thus confirmed.