Licentiate seminar: Isomeric yield ratio studies in nuclear reactions and alpha-particle induced fission of Thorium

  • Date: –11:15
  • Location: Ångströmlaboratoriet, Lägerhyddsvägen 1 4004
  • Lecturer: Simone Cannarozzo
  • Organiser: Division of Applied Nuclear Physics, Department of Physics and Astronomy
  • Contact person: Stephan Pomp
  • Licentiatseminarium

The opponent is Stefan Leupold from Uppsala University.

Despite decades of research since the initial discovery of nuclear fission, numerous unresolved questions still persist. It is known empirically that fission fragments emerge with high angular momentum. The mechanism responsible for the generation of the large angular momenta observed is one of these open questions. Since the characteristics of fission fragments are not directly measurable, experimentally accessible observables are used to derive the angular momenta using nuclear model codes. One of these observables is the yield ratio between fission products produced in different isomeric states, i.e, metastable energy levels of the same nucleus.

In this thesis, I present a study of the level density models implemented in the nuclear model code TALYS. I compare simulated and experimental isomeric yield ratios of a large number of nuclear reactions. I also present an isomeric yield ratio measurement campaign of nuclei produced by the 32 MeV alpha-particle induced fission of 232Th, performed with JYFLTRAP at the University of Jyväskylä. The analysis process, involving different identification and correction methods, and preliminary results will be shown.

Last modified: 2022-12-12