Decay Spectroscopy at the Radioactive Isotope Beam Factory (RIBF) at RIKEN

Sesión

28 mar. 2025 14:00

1001-Primera-1-1-1 - Paterna. Seminario (Universe)

Moderadores

Neutron Rich Nuclei around 208Pb

• Kathrin Wimmer ()

Lista de contribución Cronograma

21. Evolution of h11/2- orbital through new isomers near the 202Os

Dr. Yung Hee Kim (Center for Exotic Nuclear Studies, IBS)

28/3/25 14:00

We propose to measure the energies of the low-lying excited states of neutron-rich isotopes at N=126 202Os and below through decay spectroscopy of isomeric states. The primary motivation of the proposed experiment is to understand the shell evolution of π1h11/2 effective interactions. The evolution of the 1h11/2 orbital is crucial to study i) possible existence of Z=76 subshell closure and...

13. Are 200Os and 202Os isotopes spherical?

Daniele Brugnara (LNL)

28/3/25 14:15

The study of neutron-rich osmium isotopes has revealed a gradual transition from prolate to oblate deformation as neutrons are added. Among the most neutron-rich even-even isotopes where first excited states have been observed, 196Os (N=120) was studied via in-beam gamma-ray spectroscopy following multinucleon transfer reactions [1], while 198Os (N=122) was populated through fragmentation,...

29. 𝛽−𝛾 decay spectroscopy of 203Ir and 202Os: Probing contributions of first-forbidden 𝛽−decay in r-process nuclei

Youngju Cho (Seoul National University)

28/3/25 14:30

The nuclear structure and β-decay properties of neutron-rich nuclei near the N=126 shell closure are important for understanding nuclear interaction in heavy nuclei and astrophysical processes. Sensitivity studies of r-process nucleosynthesis have shown that uncertainties in the predicted abundance around the A~195 peak depend considerably on the accuracy of β-decay rates of neutron-rich...

6. Towards the N=126 r-process waiting point nuclei: isomeric and beta decays of 203Ir, 202Os, 201Re, 200W (and 199Ta?)

Zsolt Podolyak

28/3/25 14:45

We aim to populate the most neutron-rich N=126 nuclei accessible experimentally. The nuclei will be populated by the fragmentation of a high-intensity E/A=345 MeV 208Pb primary beam. The LoI requesting this development was approved by the RIKEN PAC in 2022. The text below is from the physics proposal, presented to the PAC.
The fragmentation products of interest will be implanted in an active...

24. Decay spectroscopy of neutron-rich nuclei in south-west of $^{208}$Pb

Shunji Nishimura

28/3/25 15:00

The synthesis heavy elements, such as gold and uranium, remains one of the most profound mysteries in astrophysics. These elements are believed to form through rapid neutron capture process (r-process) in extreme astrophysical environments. To better understand this process, it is crucial to study the structure and properties of very neutron-rich nuclei, particularly their beta-decay...