Radioactive nuclei play a significant role in many current astrophysical quests. From the origin of the elements through the driving of the emissions from supernovae ($^5$$^6$Ni) and kilonovae (r-process radioactivity), they are crucial for direct studies of galactic enrichment ($^7$Be, $^2$$^6$Al, $^4$$^4$Ti, $^6$$^0$Fe, $^9$$^9$Tc, $^2$$^4$$^4$Pu) and new insights on stellar explosions ($^5$$^6$Ni, $^4$$^4$Ti). Stars and their explosions, galaxies and their evolving interstellar medium, and the solar system origins, are among the targeted astrophysical objects, with numerical models, laboratory nuclear astrophysics experiments, and astronomical instrumentation as main tools. Stardust, meteorites, ocean floor deposits, cosmic-rays, and gamma-ray spectroscopy provide a rich variety of astronomy to exploit the inherent clock of radioactivity and the isotopic information that is crucial to studies of cosmic nuclear reactions. The aim of the conference is to bring together researchers from all these different fields to foster interaction by levering on the common ground of radioactivity.
The conference will also be an opportunity to celebrate the contributions of Roland Diehl to this field during his scientific career.