Fysikermøtet 2025 NTNU Trondheim

Session

Parallell A2

17 Jun 2025, 10:45

EL5 (Gamle Elektro)

140. Databases of statistical nuclear properties

17/06/2025, 10:45

Oral presentation

Nuclear data is the foundation for all applications involving nuclei. This includes everything from applied fields such as reactor simulations, weapons development, radiation safety, nuclear medicine to more fundamental applications such as cosmic-ray physics, nuclear astrophysics and nucleosynthesis.

To address the nuclear data needs a number of evaluated or compiled data libraries has...

118. Evolution of the Pygmy Dipole Resonance in the Sn mass region studied with the Oslo method

Maria Markova (University of Oslo)

17/06/2025, 11:00

Oral presentation

The pygmy dipole resonance (PDR) is commonly associated with an excess $E1$ strength on top of the low-energy tail of the giant dipole resonance (GDR) close to the neutron-separation energy in stable and unstable heavy nuclei. While its detailed structure, properties, and origin remain a matter of ongoing debates and research, the neutron-skin oscillation picture of this feature still prevails...

122. Investigating shape transitions in neutron rich ruthenium

Johannes Sørby Heines (Nuclear Physics Group, University of Oslo)

17/06/2025, 11:15

Oral presentation

The changes of nuclear deformation across the nuclear chart are among the fundamental questions in nuclear structure. The neutron rich region around mass 100 is particularly interesting for its rapid shape transitions, which make it a good testing ground for various theoretical models. The ruthenium chain is believed to contain one of the strongest cases for highly deformed triaxial shape...

133. Extracting the nuclear level density and $\gamma$-ray strength function of $^{90}Zr$

Lauren Bell (University of Oslo)

17/06/2025, 11:30

Oral presentation

The nuclear physics group at the University of Oslo (UiO) and the Oslo Cyclotron Laboratory (OCL) have developed a method, known as the Oslo method, to extract the nuclear level density(NLD) and Gamma-ray strength function (GSF). These quantities are important because they are inputs that are used in the Hauser-Fesbach statistical model calculations. These calculations are used to predict...

134. Extracting isomeric yield ratios in fission fragments

Henrik Haug

17/06/2025, 11:45

Oral presentation

In nuclear fission, a heavy nucleus typically divides into two fission fragments. The fragments are observed to have an angular momentum of 6-7 $\hbar$ on average, the mechanism behind this generation of angular momentum is still not fully understood. One approach to investigate the angular momentum of the fragments is to measure the isomeric yield ratio (IYR) i.e. the population fraction of...

136. Extraction of level density and gamma-ray strength function of 28Si using the Oslo method

Lise Anette Granheim (University of Oslo)

17/06/2025, 12:00

Oral presentation

The Oslo Cyclotron Laboratory (OCL) have developed a method, known as the Oslo method, to extract the nuclear level density (NLD) and $\gamma$-ray strength function (GSF) simultaneously from particle-$\gamma$ coincidence measurements. So far, the method has been tested and found successful for (more exotic) deformed rare-earth nuclei and for weakly deformed 148,149Sm nuclei. For lighter...