The experimental nuclear physics group at IFIC has developed techniques using Total Absorption Gamma Spectroscopy (TAGS) to determine reliable beta decay feedings and nuclear energy levels of radioactive isotopes. This nuclear data is crucial for improving the predictions of nuclear reactor antineutrino spectra, for solving both the Reactor Antineutrino Anomaly (RAA) and the observed "bump" in reactor antineutrino spectra around the 5-7 MeV energy region.
The seminar will discuss fundamental nuclear physics concepts related to the TAGS technique and the issues in reactor antineutrino spectra. It will also explain the methods used to obtain these antineutrino spectra and present the efforts of the e-shape collaboration through the I233 experiment conducted in Jyväskylä, Finland. This experiment aimed to measure beta decay spectra of relevant isotopes suspected to contribute to the problems in reactor antineutrino spectra.