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Rod-shaped Nuclei at Extreme Spin and Isospin
P W Zhao1,2,3, N Itagaki1, J Meng3,4,5
1Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan.
Researchers explored the unusual rod shape in carbon isotopes using advanced theory. They discovered that adding neutrons and rotating the nucleus stabilizes this shape by affecting electron orbitals.
Area of Science:
- Nuclear Physics
- Quantum Chemistry
Background:
- The study of nuclear shapes is crucial for understanding nuclear structure and stability.
- Anomalous nuclear shapes, like the rod shape, challenge existing nuclear models.
Purpose of the Study:
- To investigate the mechanisms stabilizing the anomalous rod shape in carbon isotopes.
- To explore the roles of extreme spin and isospin in nuclear shape stabilization.
Main Methods:
- Utilizing the cranking covariant density functional theory for a self-consistent, microscopic analysis.
- Simulating the addition of valence neutrons and nuclear rotation.
Main Results:
- Identified a key mechanism where nuclear rotation lowers sigma orbitals (parallel to the symmetry axis) of valence neutrons, stabilizing the rod shape.
- Demonstrated that spin and isospin effects further enhance the stability of this rod-shaped configuration.
Conclusions:
- The rod shape in carbon isotopes can be stabilized by specific nuclear configurations and dynamics.
- This research suggests that rod-shaped nuclei may be achievable under conditions of extreme spin and isospin.
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