The PhD defence and trial lecture will be streamed. The chair of the defence will moderate the disputation.
Ex auditorio questions: the chair of the defence will invite the audience physically present in the auditorium to ask ex auditorio questions.
→ Live streaming of trial lecture and disputation
→ Request for thesis copy (available until the disputation starts)
Trial lecture
Time and place: February 23, 2024; 10:15 AM, Lille Fysiske Auditorium (V232) - Fysikkbygningen
Title: "Nucleosynthesis of the chemical elements"
Main research findings
How does the structure of neutron-rich atomic nuclei change when moving away from stability? Here, both single-particle and collective effects are studied by using two case studies: the chain of neutron-rich copper isotopes and the chain of tin isotopes - from stable to neutron-rich.
The nuclear structure of the exotic nuclei copper-74, 76, and 78 was studied for the first time. The highly unstable copper isotopes were created through fission and beta-decay. During decays towards their ground states, they emit gamma radiation with discrete, distinctive energies. The inner structure of the copper isotopes was investigated by measuring the emitted gamma rays.
The chain of tin isotopes exhibits a phenomenon called shape coexistence. This means that a single nucleus can take on different geometrical shapes based on its energy level. In all the stable tin isotopes with an even number of protons and neutrons, shape coexistence between spherical and deformed 0+ states is known. The presence of an excited 0+ state has been found for the first time in tin-126, the next even nucleus in the isotopic chain after the stable ones.
Adjudication Committee
- Professor Maria José Garcia Borge, Spanish National Research Council, Spain
- Professor Andreas Ekström, Chalmers University of Technology, Sweden
- Professor emeritus Tor Bjørnstad, University of Oslo, Norway
Supervisors
-
Professor Andreas Görgen, Department of Physics, University of Oslo, Norway
-
Associate professor Eda Sahin, Department of Physics, University of Oslo, Norway
Chair of defence
Professor Anette Eleonora Gunnæs, Department of Physics, University of Oslo, Norway
Contact information to Department: Line Trosterud Resvold