International Workshop on Frontiers of Active Targets and Nuclear Spectroscopy (FATaNS2026) will be held at the Nishina Hall of the RIKEN Nishina Center on June 8 to 10, 2026. FATaNS2026 is a post-satellite workshop following the international conference ARIS2026 in Fukushima (June 1 to 7).
Research on nuclear spectroscopy and nuclear reactions using active targets has advanced significantly in recent years. Active targets have substantially enhanced experiments with radioactive-isotope (RI) beams by enabling high-luminosity measurements even with low-intensity beams, while achieving extremely low detection thresholds and wide solid-angle coverage. These capabilities have led to important results that provide new insights into the nuclear structure of open quantum systems, clustering phenomena, collective motion and shell evolution in unstable nuclei, as well as astrophysical nuclear reactions relevant to nucleosynthesis.
At the core of active-target technology lies the Time Projection Chamber (TPC). Substantial progress has been made in detector design, readout technologies, simulation frameworks, and data-analysis methods for TPC-based systems. In parallel, new active-target projects are underway at accelerator facilities worldwide. Beyond active targets, TPCs also play essential roles in a wide variety of nuclear-physics experiments that utilize high-precision three-dimensional tracking, and these broader applications have also seen rapid technical and scientific developments.
Given the expansion of the community and recent technological advances, there is a growing need to share technical expertise, exchange operational and analysis experience, and discuss strategies for maximizing scientific output in experiments employing active targets and TPCs.
The purpose of this workshop is to review recent research results obtained with active targets and TPC-based detectors and to provide a forum for discussing future research directions and experimental programs. In addition, the workshop aims to promote deeper discussions on theoretical studies related to nuclear spectroscopy and nuclear reactions with active targets, thereby fostering closer integration between experimental and theoretical efforts.
Topics
The main topics include:
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Experimental results in nuclear spectroscopy and nuclear reactions using active targets and TPCs
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Theoretical studies related to nuclear structure and reactions, nucleosynthesis
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Development of active-target detector systems
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Data-analysis techniques for active-target experiments
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Future experimental programs employing active targets
Invited speakers (confirmed)
Y. Funaki (Kanto Gakuin Univ.)
T. Furuno (Fukui Univ.)
Y. Ichikawa (Tohoku Univ.)
T. Oishi (National Instute of Technology, Ibaraki College)
S. Sakajo (Univ. of Osaka)
H. Togashi (Kyoto Univ.)
K. Uzawa (JAEA)
Contributed talks
The abstract submission form is available at https://indico2.riken.jp/event/5484/abstracts . The deadline is March 8.
Registration
The registration form is available at https://indico2.riken.jp/event/5484/registrations . The deadline is May 17.
Banquet
The workshop banquet will be held in the evening of June 8. The fee will be around 5,000 JPY/person.
Venue
The workshop will be held onsite at the Nishina Hall of the RIKEN Nishina Center.
Accommodation
Please make your own hotel arrangements by yourself. Those who wish to stay at the guest house are asked to contact the workshop organizers.
Support
We will support students and early-career researchers to encourage their participation. Domestic travel and local expenses will be fully or partially covered based on the availability of funds. The application form is found in the online registration form.
Important dates
March 8: Deadline for abstract submission
May 17: Deadline for registration
June 8 to 10: Workshop
Hosts
RIKEN Nishina Center
Research Center for Nuclear Physics, Osaka University
Center for Nuclear Study, the University of Tokyo
Quark Nuclear Science Institute, the University of Tokyo
Organizing committee
Tokuro Fukui (Kyushu Univ.), Tatsuya Furuno (Univ. Fukui), Tadaaki Isobe (RIKEN), Shinsuke Ota (RCNP), Daisuke Suzuki (UTokyo), Hidetoshi Yamaguchi (CNS)
