Population of Neutron-Unbound States from Direct Fragmentation

Fragmentation of a Calcium 48 beam was used to directly populate neutron-unbound states of nuclei located near the dripline. Neutron-rich fragments were detected with position sensitive detectors following a focusing quadruple triplet and a dipole magnet. The setup allowed for good isotopic separation and identification. Neutrons were detected in coincidence with the Modular Neutron Array (MoNA) located at zero degrees. Fragments from Z = 6 to Z = 12 with A/Z ranging from 2.0 to 2.7 were detected. From the relative velocity spectra of the neutrons and fragments information of the population of excited states in the different isotopes was extracted and will be presented.