Production of nuclei in neutron unbound states via primary fragmentation of Ca-48

摘要

The method of sequential neutron decay spectroscopy beginning with a primary beam of 60 MeVucleon Ca-48 was investigated as a potential tool to measure unbound resonances in neutron-rich nuclei. Neutrons were measured in coincidence with fragments, and unbound resonances were observed for Li-10, Be-12,Be-13, and O-23. The method is currently limited to resonances with small decay energies (E-decay less than or similar to 100 keV) in lighter (Z <= 10) nuclei, and the possibility of extending it to heavier, more neutron-rich nuclei will be discussed. (c) 2008 Elsevier B.V. All rights reserved.