Moderadores
Rare Earth Nuclei I
- Byul Moon (CENS, IBS)
The solar r-process abundance distribution has a small but distinct local maximum at A~160, known as the rare-earth abundance peak (REP). The REP formation is sensitive to both astrophysical and nuclear parameters. There are several different hypothesizes in the literature to understand the synthesis of these isotopes, but experimental data (nuclear masses, $\beta$-decay parameters and nuclear...
In the neutron-rich regions around N≈60 and N≈90, well-known sudden shape transitions occur. These transitions are evidenced by many aspects. From the view of ground-state energy, a pronounced kink in the trend of two-neutron separation energies ($S_{2n}$) and negative values of the neutron shell gap energies ($Δ_{2n}$) at N≈60 and N≈90. From the perspective of excited-state spectroscopy, the...
The neutron-rich rare-earth nuclei that lie mid-way between the proton shell-closures at Z=50,82 are expected to display a maximum of quadrupole deformation close to the double mid-shell N=104, Z=66. In addition, the appearance of deformed shell closures in this region, which depend on the interplay between single-particle and collective degrees of freedom, are important for understanding the...
