A high-resolution gamma-ray tracking detector for in-beam spectroscopy of unstable nuclei

2023 Fiscal Year Final Research Report

• Project/Area Number: 19H00679
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 15:Particle-, nuclear-, astro-physics, and related fields
• Research Institution: Institute of Physical and Chemical Research (2022-2023); The University of Tokyo (2019-2021)
• Principal Investigator: Wimmer Kathrin 国立研究開発法人理化学研究所, 仁科加速器科学研究センター, 客員研究員 (00748478)
• Co-Investigator(Kenkyū-buntansha): DOORNENBAL PIETER 国立研究開発法人理化学研究所, 仁科加速器科学研究センター, 専任研究員 (70574119) ; 鈴木 大介 国立研究開発法人理化学研究所, 仁科加速器科学研究センター, 研究員 (70769504)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: gamma-ray spectroscopy / nuclear structure / exotic nuclei

Outline of Final Research Achievements

As a result of our experimental campaign in FY2020, we have obtained new experimental data on the structure of very exotic nuclei. In detail we will examine (i) intruder particle-hole configurations at N=50 and the resultant collectivity, (ii) shapes and shells around 110Zr, (iii) neutron-rich nuclei toward the r-process, (iv) islands of inversion and shape transitions. A total of 8 experiments looks at these aspects and we will extract transition energies, level lifetimes, and spectroscopic factors giving new insights to the single-particle and collective properties of nuclei trough the extracted matrix elements.

Free Research Field

nuclear physics

Academic Significance and Societal Importance of the Research Achievements

私たちは、分光法と寿命を測定することで、エキゾチック核に関する知識を大幅に拡大しました。私たちの結果は、核構造モデルの開発に影響を与え、陽子と中性子の相互作用、核の基本的な単一粒子構造からの集団現象の出現、および宇宙における元素合成の影響予測に関する理解を深めます。