第11回関西核多体セミナー
日時：2026年4月14日(火) 15:30-
場所 大阪公立大学文化交流センター・ホール
〒530-0001 大阪府大阪市北区梅田1丁目2-2-600
大阪駅前第2ビル6階
https://www.omu.ac.jp/bunkakouryu-center/
講演者：Junki Tanaka (RCNP, Univ. of Osaka)
題目：Surface Cluster Emergence in Nuclei and Perspectives Beyond the Mean Field
概要：
Recent studies have suggested the formation of α clusters at the surface of heavy nuclei such as Sn isotopes, drawing renewed attention to cluster formation at nuclear surfaces. Motivated by this finding, our research group (ONOKORO) has carried out systematic studies using knockout reactions, particularly the (p,pX) reaction, to investigate cluster structures at the nuclear surface.
Our measurements indicate that not only α clusters but also light composite particles such as deuterons, tritons, and ³He may appear as cluster degrees of freedom at the nuclear surface. Detailed analyses of α-cluster knockout reactions further suggest that the spatial distribution of α clusters near the nuclear surface can be discussed with only weak dependence on the reaction mechanism. In the first part of this talk, I will present recent experimental results on the emergence of such surface clusters.
These phenomena may also point to nuclear many-body correlations beyond the conventional mean-field description. In the second part of the talk, I will discuss possible future directions for exploring such correlations, focusing on the potential role of pion degrees of freedom in nuclei.