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22/07/2026, 09:00
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Prof. Suk Bok Chang (Institute for Basic Science)22/07/2026, 09:30
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Kevin Insik Hahn (CENS, IBS)22/07/2026, 09:40
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Tomohiro Uesaka (RIBF, RIKEN)22/07/2026, 09:50
Few-nucleon correlations take on completely different forms depending on the isospin and/or density of the nuclear medium. Knockout reactions at several hundred MeV are found to be an excellent experimental tool to investigate the evolution of the few-nucleon correlations in nuclei located near the stability line toward the neutron dripline.
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In the talk, I will pickup several topics from... -
Andrei Andreyev22/07/2026, 10:15
The beta-delayed fission of very heavy and extremely neutron-rich nuclides is believed to play an important role in the so-called 'fission termination' of the astrophysical $r$-process, together with spontaneous and neutron-induced fission. However, its properties are very difficult for investigations, because of the experimental problems to reach relevant regions of nuclei. Due to this, only...
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Jie Meng (Peking Univ.), Jie Meng (Peking University)22/07/2026, 11:10
The relativistic density functional PC-PK1 and its application for nuclear structure and dynamics will be reviewed. The DRHBc mass table, the physics around N=Z nuclei, the relativistic density functional theory as well as its time-dependent version in space lattice and application for novel nuclear shape, shape fluctuations in chiral rotation, the entanglement and cross-section in...
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Dean Lee (FRIB)22/07/2026, 11:35
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Jenny Lee (Univ. of Hong Kong)22/07/2026, 13:30
The heaviest self-conjugate system bound by the strong force, $^{100}$Sn (Z = N = 50), represents the last of the “classical” doubly magic nuclei awaiting experimental confirmation and the final member along the N = Z line. It has long been a central objective in the quest to understand how nuclear forces behave under extreme conditions. $^{100}$Sn also serves as a unique testing ground for...
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Zaihong Yang (Peking Univ.)22/07/2026, 13:55
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Deuk Soon Ahn (FRIB)22/07/2026, 14:20
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Rituparna Kanungo (TRIUMF)22/07/2026, 14:45
Rare isotopes in nature are offering a wealth of new information that markedly deviate from the traditional structural properties predicted by models based on observations from stable nuclei. These isotopes play key roles in the element synthesis in the universe and bring access to unravel the state of matter in the cosmic neutron-rich environments such as neutron stars.
The Isotope...
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Grant Mathews (Univ. of Notre Dame))22/07/2026, 15:35
The astrophysical rapid neutron capture nucleosynthesis process ($r$-process) remains an active area of research due to the fact that it occurs in extreme conditions and involves reactions with exotic nuclei that are difficult to study experimentally. For the first time using the Phase-Imaging Ion Cyclotron Resonance (PI-ICR) technique, we measured the mass excesses of $^{130}$Te, $^{130}$Sn,...
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Youngman Kim (CENS, IBS)22/07/2026, 16:00
In this presentation, we will briefly introduce modern microscopic nuclear mass models and discuss their role in r-process nucleosynthesis.
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Kate Jones (UTK)22/07/2026, 16:25
The light tin isotopes are interesting owing to the vicinity of the doubly-magic $^{100}$Sn, which is the heaviest alpha-conjugate nucleus and has a cluster structure at its low-density surface [1]. The single-particle states outside of this unique core are important for predicting and understanding the structure of nuclei in the region. The ordering of the lowest single-particle states, which...
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Sunghoon Ahn (CENS, IBS)22/07/2026, 16:50
This presentation summarizes recent research activities of the Nuclear Astrophysics Group at CENS, with particular emphasis on direct reaction studies relevant to explosive nucleosynthesis and the origin of the elements. Topics include selected direct and indirect studies of astrophysically important reactions, associated detector developments, and international collaborative experiments at...
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Myun Kwon (IRIS, IBS)23/07/2026, 09:00
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Taeksu Shin (IRIS, IBS)23/07/2026, 09:05
Since 2023, the RAON accelerator facility has been operating its low-energy accelerator and experimental systems, steadily producing its scientific achievements in rare isotope science. These early successes have demonstrated the capability of the facility and established a strong foundation for future scientific programs.
To further strengthen international collaboration, the IBS TOPTIER...
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Yeonsei Chung (IRIS, IBS)23/07/2026, 09:25
The RAON (Rare isotope Accelerator complex for ON-line experiments) is a rare isotope accelerator facility in Korea focused on fundamental science research by generating and accelerating RIBs (Rare Isotope Beams). Recently, a low-energy linear accelerator, comprising an injector system and a superconducting linear accelerator, was successfully commissioned. Additionally, RIBs produced by the...
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Cheolmin Ham (IRIS, IBS)23/07/2026, 09:50
RAON (Rare isotope Accelerator complex for ON-line experiments) [1-3] is a heavy-ion accelerator facility in South Korea designed to provide both stable and rare isotope (RI) beams. The ISOL (Isotope Separation On-Line) system produces rare isotopes using a 70 MeV proton beam from the cyclotron incident on a production target. The extracted RI beams, with energies of several tens of keV, are...
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Hee-Joong Yim (IRIS, IBS)23/07/2026, 10:40
The RAON ISOL system has been developed to produce and deliver rare isotope beams.
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Recent activities have focused on stable system operation and rare isotope beam development.
Several isotope beams, including Na, Mg, Al, Cs, and Ba, have been produced and tested using different ionization methods.
This presentation provides an overview of the current status of the RAON ISOL system. -
Junho Won (CENS, IBS)23/07/2026, 11:05
Collinear laser spectroscopy provides a sensitive probe of hyperfine interactions, electromagnetic moments, and isotope shifts in short-lived nuclei. In particular, radioactive sodium isotopes provide a useful testing ground for nuclear-structure studies as well as precision tests of atomic calculations.
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In this presentation, I will present recent collinear laser spectroscopy measurements of... -
Xesus Pereira-Lopez (CENS, IBS)23/07/2026, 11:17
Direct reaction experiments in inverse kinematics are one of the best suited tools to probe a broad range of nuclear properties, providing great insight into the nuclear structure of exotic nuclei. Thus a large amount of effort was devoted at the Center for Exotic Nuclear Studies (CENS) to develop nuclear detection instruments especially intended for experiments with direct reactions in...
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Arunita Mukherjee (CENS, IBS)23/07/2026, 11:29
The PlungeR INstrument at CEns (PRINCE) is a plunger device developed at CENS for lifetime measurements in picosecond range using the recoil-distance Doppler-shift (RDDS) technique. The system is based on a high-precision piezoelectric linear stage and incorporates interchangeable target and stopper assemblies, capacitance-based distance calibration, and active feedback control to maintain the...
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Jungwoo Lee (CENS, IBS)23/07/2026, 11:41
We report proton elastic scattering experiments in inverse kinematics at the KoBRA beam line of the RAON facility, using ELARK (ELastic scattering detector Array for Reaction studies in inverse Kinematics), developed at CENS (Center for Exotic Nuclear Studies). The first experiment (KO-24-20) measured proton elastic scattering with a stable $^{40}$Ar beam at 4.4, 5.9, and 8.3 MeV/u. Since the...
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Yung Hee KIM (CENS)23/07/2026, 13:30
The RAON ISOL facility is currently in operation and is continuously expanding its portfolio of radioactive isotope (RI) beams through the development of new target materials and ion source techniques. The rich variety of RI beams will be available at the ISOL facility in near future and will open new opportunities across a broad range of physics programs, including nuclear structure, weak...
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Robert Grzywacz (Univ. Tennessee, Knoxville)23/07/2026, 13:55
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Hidetoshi Yamaguchi (CNS, Univ. of Tokyo)23/07/2026, 14:20
CRIB [1,2] is a low-energy radioactive-isotope (RI) beam separator operated by CNS, University of Tokyo, located at RIBF of RIKEN Nishina Center. Various experimental projects based on interests for nuclear structure, reaction, and nuclear astrophysics have been carried out at CRIB, forming international collaborations. CRIB can produce intense RI beams at low energies (< 10 MeV/nucleon) by...
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Myung-Ki Cheoun (Soongsil Univ.)24/07/2026, 09:00
Mirror charge radii provide a promising route to neutron-skin information, but their interpretation requires control of nuclear isospin-symmetry breaking beyond the Coulomb interaction. We present a differential Skyrme energy-density-functional analysis that treats mirror displacement energies (MDEs) and mirror charge-radius differences within the same class-III charge-symmetry breaking (CSB)...
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Kyung Yuk Chae (Sungkyunkwan Univ.)24/07/2026, 09:25
Type I X-ray bursts (XRBs) are explosive astrophysical phenomena powered by hundreds of thermonuclear reactions in the rapid proton capture process ($rp$-process). Sensitivity studies with XRB simulation codes have been used to identify nuclear reactions that have the most impact on observables and should be prioritized for future studies. Due to the high computational cost and time-consuming...
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Michelle Kuchera (Davidson College)24/07/2026, 09:50
Foundation models such as the GPT models, BERT, and DALL-E have shown impressive performance in text and image domains. Such models are built through large-scale training on self-supervised tasks. Similarly, foundation models built for physics-native data structures show potential for applications in nuclear physics experiments. This talk presents work toward developing a multi-purpose deep...
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Jeongsu Ha (CENS, IBS)24/07/2026, 10:40
The triaxial degree of freedom in nuclei has an important role in the shape evolution. The neutron-deficient and neutron-rich Mo isotopes provide a good example. The large collectivity of a neutron-deficient nuclide $^{84}$Mo leads to the isospin-symmetric island of inversion, and the large triaxiality is expected from the state-of-the-art shell model calculation [1]. For the nuclides lying on...
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Youngseub Jang (Korea Univ.)24/07/2026, 11:05
Nuclei near the doubly magic nucleus $^{100}$Sn (N = Z = 50) have been extensively studied to investigate nuclear structure, including shell evolution, seniority effects, and proton–neutron interactions. In this work, $^{94}$Pd with N = Z + 2 was investigated with a focus on isovector (T = 1) and isoscalar (T = 0) neutron-proton pairing using the fast-timing measurement. Half-lives of yrast...
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Sunji Kim (CENS, IBS)24/07/2026, 11:17
Cryogenic gas targets are widely used in low-energy nuclear experiments for studies of nuclear astrophysics and nuclear structure. Compared with solid targets such as CH$_{2}$ and CD$_{2}$, cryogenic gas targets offer high purity and high density. These advantages reduce unwanted background contributions and enhance reaction yields, thereby improving the sensitivity of nuclear physics...
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30. Development and Evaluation of a Quadrant Silicon Pad Sensor for the TexAT Active Target DetectorHyeyoung Lee (CENS, IBS)24/07/2026, 11:29
For low-energy rare-isotope beam experiments, a 5 x 5 cm$^2$ quadrant silicon pad sensor was developed for the TexAT active target system. To prevent premature breakdown in large-area segmented sensors, three guard-ring configurations (G6, G9, G14) were investigated via TCAD simulations and experimental measurements. Simulations proved that the G9 design, using a graded-spacing strategy,...
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Myungkuk Kim (CENS/IBS)24/07/2026, 11:41
We establish a universal baseline for the widths of near-threshold single-neutron resonances in L>0 partial waves. The baseline arises from discrete scale invariance at zero energy in the finite square-well potential and depends only on geometry, angular momentum, and resonance energy. Comparison with data shows that it provides a robust benchmark, while deviations caused by Woods-Saxon...
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Xiao Yang (CENS, IBS)24/07/2026, 11:53
The charge-dependent nucleon-nucleon ($NN$) interaction plays a crucial role in understanding the nuclear structure and reaction problems. In this work, we explore the charge-dependent $NN$ interaction in covariant chiral effective field theory. By incorporating the isospin-breaking contributions, we derive the charge-dependent covariant chiral $NN$ potential up to next-to-next-to leading...
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Jung Keun Ahn (Korea Univ.)24/07/2026, 13:30
Subthreshold pion production in heavy-ion collisions provides unique insight into high-density nuclear matter and multi-nucleon dynamics. While neutral pion creation in proton-proton collisions requires over 280 MeV, nuclear collisions achieve this at much lower energies—down to 25 MeV/nucleon—thanks to Fermi motion and collective effects, which remain incompletely understood. The SUPER...
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Faical Azaiez (INFN-LNL)24/07/2026, 13:55
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Byungsik Hong (Korea Univ.)24/07/2026, 14:45
The density as well as momentum dependences of the symmetry potential in nuclear matter can be studied using the collective flow parameters in intermediate energy nuclear collisions, where mean-field dynamics and nucleon–nucleon collisions compete. The directed and elliptic flow parameters for light charged particles in Xe + Sn collisions at 100 MeV/u, measured by the INDRA detector, have been...
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Hiroshi Watanabe (CENS, IBS)24/07/2026, 15:10
The Nuclear Structure group at CENS is promoting research projects aimed at measuring the lifetime of excited states by means of the electronic fast-timing method using LaBr3(Ce) detectors, recoil distance technique by Plunger, and low-energy Coulomb excitation. In this presentation, some results of the commissioning experiments performed at RIBF and RAON will be introduced.
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Navin Alahari (GANIL)24/07/2026, 15:35
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