Total reaction cross section for theHe6+Be9system

Abstract

Elastic angular distributions of the $^{6}\mathrm{He}$ + $^{9}\mathrm{Be}$ scattering at ${E}_{\mathrm{lab}}=16.2$ and 21.3 MeV have been analyzed in the context of the optical model. The projectile-target optical potential was calculated in a cluster model where the contributions from the fragment target $(\ensuremath{\alpha}{\ensuremath{-}}^{9}\mathrm{Be})$ and the dineutron target $(2n{\ensuremath{-}}^{9}\mathrm{Be})$ are separated and the latter was searched to reproduce the experimental data. The total reaction cross sections for the $^{6}\mathrm{He}$$\phantom{\rule{0.16em}{0ex}}+\phantom{\rule{0.16em}{0ex}}{}^{9}\mathrm{Be}$ system have been obtained, and the error bars have been estimated considering the spread between the present optical model and previous coupled channels and continuum discretized coupled-channels calculations. The cross sections have been reduced and compared in a systematics involving tightly bound, weakly bound, and the exotic $^{6}\mathrm{He}$ projectiles, all on $^{9}\mathrm{Be}$ target. An analysis of the enhancements observed in the total reaction cross section induced by $^{6}\mathrm{He}$ on light, medium mass, and heavy targets is presented.