Sub-barrier fusion enhancement with radioactive 134Te

Abstract

The fusion cross sections of radioactive ${}^{134}$Te + ${}^{40}$Ca were measured at energies above and below the Coulomb barrier. The evaporation residues produced in the reaction were detected in a zero-degree ionization chamber providing high efficiency for inverse kinematics. Both coupled-channel calculations and comparison with similar Sn+Ca systems indicate an increased sub-barrier fusion probability that is correlated with the presence of positive Q-value neutron transfer channels. In comparison, the measured fusion excitation functions of ${}^{130}$Te + ${}^{58,64}$Ni, which have positive Q-value neutron transfer channels, were accurately reproduced by coupled-channel calculations including only inelastic excitations. The results demonstrate that the coupling of transfer channels can lead to enhanced sub-barrier fusion but this is not directly correlated with positive Q-value neutron transfer channels in all cases.

References in corpus (5)

• Subbarrier fusion reactions and many-particle quantum tunneling
• Multinucleon transfer reactions in closed-shell nuclei
• Fusion of radioactive ${}^{132}$Sn with ${}^{64}$Ni
• Sensitivity to multi-phonon excitations in heavy-ion fusion reactions
• Microscopic analysis of sub-barrier fusion enhancement in ${}^{132}$Sn+${}^{40}$Ca vs. ${}^{132}$Sn+${}^{48}$Ca}

Cited by in corpus (7)

• Recent experimental results in sub- and near-barrier heavy ion fusion reactions
• Systematics of capture and fusion dynamics in heavy-ion collisions
• Dependence of fusion on isospin dynamics
• Dynamical effects in fusion with exotic nuclei
• Coupled-channels description of multinucleon transfer and fusion reactions at energies near and far below the Coulomb barrier
• Proton and neutron exchange as a prelude to fusion at near-barrier energies
• Nuclear incompressibility and its enduring impact on fusion cross-section