九大原子核セミナー

2014年10月22日(水) 16:30

講師： 鈴木 宜之 (新潟大学・理研)

演題：Clustering and response functions of light nuclei in explicitly correlated Gaussians

場所：理学部 物理 第一会議室 (理学部2号館1階2154室)

概要：
　Explicitly correlated Gaussian basis has been used for solving few-body problems in many fields. The basis functions are easily adaptable and flexible enough to describe complex few-body dynamics. We obtain a unified description of different types of structure and a fair account of correlated motion of interacting particles as well as the tail of the wave function.
　I present some examples that show the power of the correlated Gaussians:　The bound　and resonant states of 4He, the electric dipole response functions　of 4He and 6He, and α-clustering in 16O in the　framework of a 12C core plus four nucleon model. The case of　4He is an ab initio type study using a realistic interaction, while　the cases of 6He and 16O are based　on effective interactions with emphasis on a　detailed account of the underlying dynamics.
　It is a challenge for future to extend the application of the correlated Gaussians to a study on a competition between single-particle motion and clustering around a non-inert core. Such a study will be important to evaluate the rate of the radiative capture reactions 12C(α, γ)16O at low energy and to account for the low-lying spectrum of 212Po that shows the large α-decay width and the enhanced electric dipole transitions.