Our group studies Nucleon Correlations and Nuclear Shell Structure using Direct Reactions (one-nucleon and pair-nucleon transfer reactions, single-nucleon and pair-nucleon knockout reactions, qusai-free alpha knockout reactions), In-beam Gamma Spectroscopy and Beta-decay Spectroscopy using facilities in RIKEN Nishina Center (Japan), RCNP Osaka University (Japan) and NSCL Michigan State University (US).



To understand the new nuclear properties in a nucleus, a finite-body quantum system of hadrons and self-organizing system governed by the strong interactions, it is essential to achieve detailed knowledge of few-body correlations between nucleons, which is beyond the modern shell-model and mean-field-model theories. The scientific challenges and achievements of understanding nucleon correlations (including correlation effect on a nucleon, neutron-proton correlations, three-body forces, and alpha-cluster structure) are the key focuses and would steer into the new era of nuclear physics. Our group employs direct reaction experimental techniques (transfer reaction, knockout reaction, quasi-free scattering reaction) to probe these nucleon correlations


The “magic number” is the most fundamental quantity governing the structure of a nucleus. The concept of nuclear magic number (2, 8, 20, 28, 50, 82 and 126) in nuclear structure was introduced by the discovery of particularly stable nuclei with specific proton (Z) and neutron numbers (N). By examining a large number of precise experimental data close to the β-stability, these magic numbers were then recognized as a consequence of underlying nuclear shell structure given by a mean field potential plus a strong spin-orbit interaction as the discovery of the 1963 Physics Nobel Prize. Along this direction, a vast amount of nuclear data was then interpreted simultaneously. Therefore, nuclear magic numbers are regarded as cornerstones to the studies of nuclear physics. However, the magic numbers marking the complete filling of a nuclear shell are well established for stable nuclei, but are not universal over the nuclear chart. Our group employs in-beam gamma spectroscopy to investigate the nuclear structure and magicity of exotic nuclei.