Abstract
We investigate the fragmentation mechanism reflecting the cluster structure of the nucleus. We perform antisymmetrized molecular dynamics (AMD) calculations of and reactions, and compare fragmentation with fragmentation. The neutron drip-line nucleus has been predicted to have a well-developed cluster structure in its ground state while the neutron closed-shell nucleus has no clustering features in its structure. The clustering structure of is reflected in its fragmentation as the dynamical cluster breakup into He and Li isotopes, depending on the incident energy. In the low-incident-energy region around 30 MeV/nucleon, dynamical cluster breakup of occurs and brings about an abundance of He and Li isotopes in fragmentation compared with those in fragmentation. In the high-incident-energy region above 50 MeV/nucleon, dynamical cluster breakup of hardly occurs and the cluster structure of the nucleus is not reflected in its fragmentation. We suggest here the coincident experiment between He and Li isotopes as an experimental way to confirm whether the nucleus has a cluster structure in its ground state or not.
- Received 7 September 2000
DOI:https://doi.org/10.1103/PhysRevC.63.034615
©2001 American Physical Society