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

Sesión

28 mar. 2025 9:00

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

Moderadores

Neutron Rich Nuclei towards 132Sn

• Alejandro Algora (IFIC (CSIC-Univ. Valencia))

Lista de contribución Cronograma

10. Perspectives for decay spectroscopy in the region beyond 132Sn

Andrea Jungclaus (IEM-CSIC)

28/3/25 9:00

In this contribution, I will present my personal view of the perspectives of decay spectroscopy experiments at RIBF in the years 2026/2027 in the region south-east of doubly-magic 132Sn. This view is based on past experience and theoretical expectation and considers isomeric decays, the observation of beta-delayed gamma radiation, as well as beta-decay half-lives.

38. Decay Spectroscopy of Neutron-Rich Rh and Ru Isotopes Towards N=82

Zhihuan Li

28/3/25 9:15

We propose studying neutron-rich Rh and Ru isotopes near N=82, up to 126Rh and 124Ru, using beta decay and isomer spectroscopy with a new gamma detection array. The primary goal of this proposal is to test the persistence of the N=82 shell closure, which is robust in Cd and Pd isotopes but remains uncertain for Z<46. Additionally, this study aims to benchmark nuclear structure models and...

18. Exploring the proton and neutron shell evolution in the “South-west” of doubly magic 132Sn

Dr. Zhiqiang Chen (GSI)

28/3/25 9:30

The monopole-driven shell evolution has been revealed in the south of doubly magic $^{132}$Sn for both neutron and proton shells. From the neutron shell side, an inversion of the $3/2^{+}$ and $11/2^{-}$ state, which corresponds to the neutron $d_{3/2}$ and $h_{11/2}$ orbitals, respectively, from $^{131}Sn_{81}$ to $^{129}Cd_{81}$, has been discovered in a recent mass measurement. According to...

30. Question on the robustness of N = 82 shell closure and seniority conservation of g9/2 shell in south 132Sn region

Dr. Guang-shun LI (IMP)

28/3/25 9:45

Over the past few decades, research have revealed that some nuclear magic numbers can shift or disappear in regions where significant imbalance between the number of protons and neutrons exist. It remains an open question whether such a change can occur for N = 82 in south 132Sn region. If the shell gap is reduced, it becomes easier for particles to be excited across the shell. which drives...

25. Decay Spectroscopy of Neutron-Rich Sn Isotopes

Phong Vi (RIKEN)

28/3/25 10:00

Neutron-rich tin (Sn) isotopes play a pivotal role in the rapid neutron-capture process (r-process), a key mechanism for synthesizing heavy elements in extreme astrophysical environments. The interplay of slower $\beta$-decay rates relative to neutron-capture rates - driven by shell effects near $Z = 50$ - delays the r-process flow, forcing material to undergo successive neutron captures until...