| 1956 | Peter Brix becomes the first director of the IKP. |
| 1957 | Foundation of the IKP |
| 1964 | First electron beam at the “Darmstadt Linear Electron Accelerator” (DALINAC) |
| 1965 | The main building is awarded the title “Exemplary Achievement” by the State of Hesse |
| 1971 | Discovery of the “Giant Quadrupole Resonance” (GQR) by Rainer Pitthan and Thomas Walcher |
| 1974 | Achim Richter becomes director of the IKP |
| 1984 | Discovery of the “Scissors Mode” in deformed nuclei by Achim Richter |
| 1987 | Decommissioning of the DALINAC to prepare for the construction of a superconducting, recirculating, continuous-wave electron accelerator according to the design of Achim Richter |
| 1991 | Beginning of full operation of the “Superconducting-Darmstadt Linear electron Accelerator” (S-DALINAC) with two recirculations as the third superconducting electron LINAC worldwide. |
| 1997 | First observation of the fine structure of the “Pygmy dipole resonance” (PDR) by R.-D. Herzberg et al. |
| 2003-2015 | Collaborative Research Center (CRC) 634 “Nuclear structure, nuclear astrophysics and fundamental experiments with low-momentum transfer at the superconducting Darmstadt Linear electron Accelerator (S-DALINAC)” |
| 2007 | Norbert Pietralla becomes director of the IKP |
| 2013 | Establishment of the Theory Center in the building S2|11 |
| 2015 | Discovery of the competing double-gamma decay of nuclei by C. Walz et al. |
| 2015/2016 | Addition of a third recirculation to the accelerator to have the option of running an energy-recovery mode, first “multi-turn SRF-ERL” worldwide |
| since 2016 | Collaborative Research Center (CRC) 1245 “Atomic nuclei: From fundamental interactions to structure and stars” |
| since 2016 | Graduate school (GRK) 2128 “AccelencE: accelerator physics and technology for particle accelerators with energy recovery” in collaboration with Johannes Gutenberg-Universität Mainz. |
| since 2017 | Collaborative Research Center/Transregio (CRC-TR) 211 “Strongly interacting matter at extreme conditions” in collaboration with Goethe-Universität Frankfurt, Universität Bielefeld and Justus Liebig-Universität Gießen |
| 2018 | Alexandre Obertelle receives the first Humboldt professorship at TU Darmstadt |
| 2019 | Establishment of the “International Center for Nuclear Photonics” within the framework of the LOEWE program of the state of Hesse |
| 2019 | Opening of the new lecture hall in the main building |
| 2022 | Prof. Gabriel Martinez-Pinedo receives a Leibniz price from DFG |
| 2022 | Discovery of an interacting four-neutron system by Meytal Duer, Thomas Aumann et al. |
| 2025 | Alexandre Obertelli becomes director of the IKP |
| 2025 | Prof. em. Achim Richter receives the Lise Meitner Prize of the European Physical Society (EPS) |