2012 Fiscal Year Final Research Report
Shell evolution in nuclei investigated with large-scale shell-model calculations
| Project/Area Number |
21740204
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
UTSUNO Yutaka 独立行政法人日本原子力研究開発機構, 先端基礎研究センター, 研究副主幹 (10343930)
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| Research Collaborator |
SHIMIZU Noritaka 東京大学, 理学系研究科, 特任准教授 (30419254)
OTSUKA Takaharu 東京大学, 理学系研究科, 教授 (20201379)
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| Project Period (FY) |
2009 – 2012
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| Keywords | 核構造 / 不安定核 / 殻構造 / 魔法数 / 殻模型 / 有効相互作用 |
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| Research Abstract |
We have made a large contribution to clarifying the mechanism that causes the evolution of shell structure in unstable nuclei, using large-scale nuclear-structure calculations based on the shell model. In particular, we have constructed a framework that describes the structure of unstable nuclei around neutron number, denoted N, 28, and proposed a new picture named “tensor-force driven Jahn-Teller effect” to account for the origin of the disappearance of the N=28 magic number. Furthermore, we have revealed the shell structure of unstable nuclei beyond N=28. We have also greatly advanced the Monte Carlo shell-model method to enable very large-scale shell-model calculations.
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