The southern shore of the island of inversion studied via quasi-free scattering

Summary

The southern shore of the Island of Inversion is studied via quasi-free scattering, revealing the breakdown of the N=20 magicity for O and F isotopes. The results show that 28O and 30F are unbound, and the shell gap at N=20 is not restored.

Highlights

• The Island of Inversion is a region in the chart of nuclides where the N=20 magic number is broken.
• Quasi-free scattering is used to study the structure of neutron-rich O and F isotopes.
• The results show that 28O and 30F are unbound, indicating the breakdown of the N=20 magicity.
• The shell gap at N=20 is not restored in the F isotopes.
• Theoretical calculations using the SDPF-U-MIX interaction reproduce the experimental results.
• Ab-initio calculations using chiral EFT interactions also reproduce the results, but with some discrepancies.
• The study of the Island of Inversion provides insights into nuclear structure and the role of three-nucleon forces.

Key Insights

• The breakdown of the N=20 magicity in the Island of Inversion is due to the weakening of the monopole interaction and the strengthening of the quadrupole interaction.
• The quasi-free scattering method provides a powerful tool for studying the structure of neutron-rich nuclei, allowing for the measurement of single-particle spectroscopy and the extraction of information on the nuclear shell structure.
• The SDPF-U-MIX interaction is a successful shell-model interaction that reproduces the experimental results in the Island of Inversion, but its limitations are also highlighted.
• Ab-initio calculations using chiral EFT interactions provide a more fundamental understanding of nuclear structure, but require further development to accurately reproduce experimental results.
• The study of the Island of Inversion highlights the importance of three-nucleon forces in shaping the nuclear shell structure, particularly in neutron-rich nuclei.
• The results of this study have implications for our understanding of nuclear structure and the role of three-nucleon forces in shaping the nuclear shell structure.
• The experimental and theoretical methods developed in this study can be applied to other regions of the chart of nuclides, providing new insights into nuclear structure and the role of three-nucleon forces.

Mindmap

Citation

Kahlbow, J. (2024). The southern shore of the island of inversion studied via quasi-free scattering (Version 1). arXiv. https://doi.org/10.48550/ARXIV.2412.16799