Complete Fusion Nuclear Reactions Induced by Krypton Ions. Effective Threshold and Minimum Distance of Approach for the Reactions Cd116 + Kr84 and Ge72 + Kr84

Abstract

Effective energy thresholds have been measured for the cross sections of complete fusion reactions induced by krypton ions on ${\mathrm{Cd}}^{116}$ and ${\mathrm{Ge}}^{72}$. They show that the minimum distance of approach for the reaction is shorter than with lighter projectiles and corresponds to a Coulomb repulsion at a distance of $r_0({A_1}^{\frac{1}{3}}+{A_2}^{\frac{1}{3}})$ fm with $r_0=1.32\mathrm{}$ fm instead of 1.45 fm.