2018 Fiscal Year Final Research Report
Microscopic and systematic description of the spin-isospin responses of heavy neutron-rich nuclei in density-functional theory
| Project/Area Number |
16K17687
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Kyoto University (2017-2018)
Niigata University (2016) |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | 中性子過剰核 / スピン・アイソスピン応答 / 密度汎関数理論 / ベータ崩壊 |
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| Outline of Final Research Achievements |
A systematic investigation on the spin-isospin responses in neutron-rich nuclei have been made. Nuclear energy-density functional method, a microscopic quantum many-body theory in terms of the nucleonic degree of freedom, was applied. Due to the imbalance of the chemical potentials of neutrons and protons, the negative-parity modes are expected to occur in low energy. The microscopic calculation revealed the unique roles of the superfluidity on the appearance of low-lying dipole modes and predicted the occurrence of the analog of the pygmy dipole mode.
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| Free Research Field |
原子核構造
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| Academic Significance and Societal Importance of the Research Achievements |
中性子過剰核における新しいタイプの集団運動の発現可能性は，原子核物理学における重要なテーマの一つである。本研究では，これまで研究が進んでいなかった中性子過剰核のスピン・アイソスピン応答を微視的な理論枠組みを用いて調べることで，新しい励起モードを予言することができた。これらのモードはベータ崩壊にも影響を与える可能性が高く，重元素の起源とされるrプロセス元素合成過程のより深い理解にも貢献できる。
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