I will discuss the roles of nuclear structure on the beta decay in the framework of DFT.
beta-delayed neutrons
Discovered by Roberts et al. beta delayed neutrons are very relevant in reactor control, nuclear astrophysics and nuclear structure. Beta delayed neutron emission is a process that become more a more dominant as we move far away from stability, so its study is crucial for understanding the nuclear structure of very exotic neutron rich nuclei. In this talk, I will present how it is possible to...
The neutron-rich $N \sim 126$ region is important to r-process calculations, but difficult to be accessed by experiments. This region is unique for its strong competition between allowed and first-forbidden transitions, which complicates half-life predictions. Besides, the abundances of the third r-process peak elements and actinides are sensitive to half-lives of $N = 126$ isotones....
We study beta decay by using beyond mean field model so called Subtracted second RPA model including 2-particle-2hole configurations on top of 1p-1h configuration. We study also the effect of tensor correlations in beta decay process.
$\beta$-delayed neutron emission is a common and dominating decay process for most of the neutron-rich nuclei far from the stability line. Experimental investigations on $\beta$-delayed neutrons are of great significance in a large variety of fields, including nuclear physics, astrophysics, and industrial applications. First, it is a sensitive probe to the $\beta$-decay feedings above neutron...
Understanding neutron-rich unstable nuclei is crucial for investigating the r-process nucleosynthesis. In particular, the $\beta$ decay of the $N = 126$ isotones is decisive for the production of the third peak, including gold and platinum. In this talk, based on nucleosynthesis uncertainty calculations, I will discuss the possibility of addressing the "missing gold problem" in the galactic...
The sensitivities of the r-process rare-earth peak abundances to nuclear masses and beta-decay half-lives have been studied in different astrophysical scenarios. The most impactful nuclei are identified by varying nuclear masses and beta-decay half-lives, respectively. The impacts of nuclear mass as well as β-decay rate of an individual nucleus on the r-process rare-earth peak abundances are...
We have been systematically studying shape coexistence and shape evolution in neutron-rich nuclei. These are one of the important subjects to understand appearance of variety of nuclear structure as increase of neutron and proton numbers. We have studied change of nuclear structure by the $\beta$ decay in wide isospin region such as neutron-rich Mg and Al isotopes close to ‘Island of Inversion...
In this talk, the some experimental results from the previous decay spectroscopy carried out at RIBF, EURICA (EUROBALL-RIKEN Cluster Array), will be introduced. These results are mostly from the neutron-rich isotope beyond the doubly-magic $^{132}$Sn nucleus, which are important for the $r$-process nucleosynthesis scenario. New nuclear structure observables will be presented with the...
The rapid neutron capture process ($r$-process) is the most important mechanism for the synthesis of about half of the elements heavier than iron. It occurs in an environment with relatively high temperatures and high neutron densities. The abundances of the elements created by the $r$-process strongly depend on several nuclear inputs like masses, neutron capture rates, $\beta$-decay rates,...
The study of the $\beta$-decay half-lives and massees of waiting-point nuclei with $N = 126$ is crucial to understand the explosive astrophysical environment for the formation of the third peak in the observed solar abundance pattern, which is produced by a rapid neutron capture process (r-process). However, the half-life and mass measurements of the waiting-point nuclei remain impracticable...
