Abstract
HISPEC-DESPEC is a collaboration, part of NUSTAR, aiming at studying the structure of nuclei produced by projectile fragmentation reactions exploiting the beams delivered by the accelerator system at present and future facilities GSI and FAIR. In the early stages of the experimental activity at FAIR Phase-0, started in 2020, the collaboration focused the attention on studies following the decay of long-living isomeric states and β-decays with lifetimes in the millisecond-to-second range. A description of the set-up and of first results obtained in the experimental campaigns covering years 2020-2022 are the subject of this talk.