Study of elementary excitations in the nucleon pair condensation using the recoilless nuclear reaction

2023 Fiscal Year Final Research Report

• Project/Area Number: 20H01928
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
• Research Institution: Kyoto University (2021-2023); The University of Tokyo (2020)
• Principal Investigator: Masanori Dozono 京都大学, 理学研究科, 助教 (60616259)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 対相関 / 対振動 / 対凝縮 / 核子対移行反応

Outline of Final Research Achievements

A new method, the (α,6He) reaction, has been established to study pair vibration in nuclei, which is a key to understand the mechanism of nucleon pair condensation. The first proof-of-principle experiment has demonstrated that the (α,6He) reaction is quite an efficient probe to pair vibration components. Systematic studies of pair vibrations in superfluid nuclei are now feasible with the experimental method established in this work.

Free Research Field

原子核物理実験

Academic Significance and Societal Importance of the Research Achievements

本研究で確立した手法により、原子核の対振動の実態が明らかになれば、核子対凝縮のヒッグスモードに関する議論が初めてできるようになり、凝縮の発現機構の理解が一歩進む。さらに、そこから核子対凝縮の性質も定量化できる可能性があり、理論モデルの精緻化を促すと予想され、例えば中性子星の内部構造の理解にもつながる。