Topic (题目):Probing Structure of Light Atomic Nuclei
Speaker (报告人): Ong Hooi Jin（日本大阪大学）
Date (时间): 2018年4月11日（周三）下午2:00
Place (地点): 北京大学技物楼2层会议室
Contact person（联系人）: 楼建玲（jllou@pku.edu.cn）
Abstract:
Probing Structure of Light Atomic Nuclei
Ong Hooi Jin
RCNP, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Atomic nuclei are finite quantum many-body systems consisting of protons and neutrons (known collectively as nucleons). Their structures are governed by the strong interactions. Extensive experimental and theoretical studies over the past decades have yielded sophisticated phenomenological realistic nucleon-nucleon, as well as (semi-phenomenological) chiral two- and three-nucleon, interactions. However, it is still not possible to understand even the nuclear structures of relatively light nuclei such as carbon and oxygen isotopes. In this talk, I will briefly introduce the experimental activities at the RCNP accelerator facility, and focus on two recent experimental studies at RCNP. In the first work, we determined the proton distribution radii of neutron-rich carbon isotopes using radio-isotope beams, and obtained evidence [1] for a proton subshell closure, which was partially predicted in 1963 [2]. The second work is related to the observation [3] of the effect of the tensor interaction, which is an important but still largely unknown component of the realistic nucleon-nucleon interactions, in 16O.
Reference
[1] D.T. Tran, H.J. Ong et al., “Evidence for prevalent Z=6 magic number in neutron-rich
carbon isotopes”, accepted for publication in Nat. Comm.; arXiv1709.03355 [nucl-ex].
[2] M. Goeppert-Mayer, “The shell model”, (1963) Nobel Lectures, Physics, 20 – 37 (1963).
[3] H.J. Ong, I. Tanihata et al., “Probing effect of tensor interactions in 16O via (p,d)
reaction”, Phys. Lett. B 725, 277 – 281 (2013).
