Investigations of Cluster Effects in Atomic Nuclei

We introduce our recent works on the clustering effects in atomic nuclear systems. The clustering structures for ²⁰Ne and ^9,10Be isotopes are studied with the Tohsaki-Horiuchi-Schuck-Röpke (THSR) wave function. It is found that a single THSR wave function can provide good description for the cluster state. The nonlocalised aspect of cluster dynamics is discovered with the hybrid-THSR-Brink wave function. Extensions are made for the THSR wave function to enable studies of N≠Z nuclei. The nuclear molecular orbit structures in low lying states of ^9,10Be isotopes are correctly reproduced with this wave function. We also discuss the α-decay processes for proton/neutron-rich nuclei. The effect of proton/neutron skin is found to be considerable on α-decay half-life.