Study of three-nucleon interaction effect and its influence on astrophysical reactions using ab initio approaches

2023 Fiscal Year Final Research Report

• Project/Area Number: 18K03635
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
• Research Institution: Osaka Metropolitan University (2022-2023); Hokkaido University (2018-2021)
• Principal Investigator: Horiuchi Wataru 大阪公立大学, 大学院理学研究科, 准教授 (00612186)
• Project Period (FY): 2018-04-01 – 2024-03-31
• Keywords: 原子核構造 / 原子核反応 / 核力・３体力 / 宇宙核物理

Outline of Final Research Achievements

Nuclear reactions in stars are known to play an important role in the nuclear synthesis of elements in our universe. However, the experimental determination of the reaction rates is difficult as the rates are extremely small. Therefore, a systematic evaluation of reaction rates must rely on theoretical calculations. In this study, we described the nuclear structure starting from the fundamental interactions with various approaches. The validity of our approach is confirmed by comparing them with experimental data. We predicted various phenomena for unknown nuclear systems in vacuum as well as in various star environments, where laboratory experiments are difficult. The methods established in this study are practical and directly applicable to astrophysical reactions. Further extension is highly expected.

Free Research Field

原子核理論

Academic Significance and Societal Importance of the Research Achievements

原子核の第一原理的記述は現在の原子核物理学の中心的課題の一つあり、原子核物理学の長年の夢でもあります。そのような計算の実行には多数の困難があり、散乱(非束縛)状態が関与する観測量への適用は未だ限られた例にしか行われていないのが現状です。本研究は日本発の第一原理的な原子核研究法を確立を目指したものです。この枠組みは多粒子系に一般な計算法であることから、冷却原子系、ハイパー原子核、そしてハドロン系の解析等、近隣分野への応用も大いに期待できます。