Orateur
Description
Recently the DESPEC nuclear spectroscopy campaign started at the SIS18/FRS facility at GSI as part of the FAIR/NUSTAR Phase-0 program. It aims at the investigation of exotic heavy nuclei produced in fragmentation reactions employing detectors and instrumentation developed for the FAIR facility. With the unique availability of new lanthanide primary beams, i.e. $^{170}$Er, secondary ion beams of very neutron-rich nuclei can be produced at the GSI/FAIR fragmentation facilities with unprecedented intensities. These nuclei mid-way between the proton closed shells at Z=50 and 82 and neutron closed shells at N=82 and 126 are expected to exhibit some of the largest collectivities known. Thus, a plethora of interesting collective phenomena is being expected.
The production cross sections are sufficient for decay studies at the current SIS18/FRS facility. For that purpose the DESPEC collaboration has developed the DEGAS HPGe array, enabling high-resolution gamma-spectroscopy with highest efficiency. Complementary lifetime measurements are possible with the FATIMA LaBr3 fast-timing array. First experiments are currently in preparation for data taking from 2024 on. With the advent of the SIS18/SIS100/Super-FRS facility at FAIR still higher secondary beam intensities are envisaged. They will enable in addition in-beam studies based on relativistic Coulomb excitation and few nucleon knock-out reactions. For such studies, the AGATA HPGe tracking array will be employed.
The physics plans and experimental details will be reported.
