Effect of the Structure of Light Loosely Bound Nuclei on the Mechanisms of Nuclear Reactions

Abstract

The results of experiments devoted to studying fusion and transfer reactions in beams of loosely bound (3He) and cluster (6Li, 7Li) nuclei, as well as nuclei that have a halo structure (6He and 8He), with nuclei of light and heavy elements are generalized. Special features in the behavior of cross sections for the formation of evaporation residues and transfer-reaction products at energies near the barrier are revealed. The behavior of cross sections for nucleon- and cluster-transfer reactions leads to different populations of single-particle and collective states in target-like nuclei. The effect of various channels of nuclear reactions involving light nuclei on the population of the 195mHg and 197mHg(13/2+), 198mTl and 196mTl(7+), and 196mAu and 198mAu(12−) pairs of isomeric states is considered. The values of the isomeric ratios (σm/σg) for reaction products originating from fusion reactions followed by particle evaporation and from nucleon-and cluster-transfer reactions are explained.