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Nuclear Science Lab
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The lab uses accelerators to explore the physics of atomic nuclei, hadrons, and beams.
AboutAbout the lab
Exploring the world of atomic nuclei, based at an accelerator facility
The Nuclear Science Research Group is based at the Mikamine Facility of the Research Center for Advanced Quantum Beam Science, and studies nuclear and hadron physics, accelerator science and beam physics, and nuclear and radiochemistry.
The Mikamine Facility has three electron linear accelerators and a 1.3 GeV electron synchrotron, and serves as a nationwide joint-use and joint-research facility for researchers both inside and outside the university.
Cutting-edge research is carried out using electron beams and gamma rays from 20 MeV to 1.3 GeV produced by these accelerators.
Graduate students in the Nuclear Science Division take part in research in their respective fields in an environment with large-scale accelerators.
Key terms
- Hadron
- A collective term for particles formed when quarks are bound together by the strong force. Protons and neutrons are also hadrons
- Pentaquark baryon
- A particle made of five quarks. Ordinary baryons are made of three quarks
- Exotic nuclei
- Short-lived atomic nuclei that decay and have a severe imbalance between the numbers of protons and neutrons
- Electron scattering
- A method of probing the internal structure of an atomic nucleus by firing electrons at it and observing how they are deflected
ResearchResearch themes
Using the electron beams and gamma rays produced by the accelerators at the Mikamine Facility of the Research Center for Advanced Quantum Beam Science, the lab conducts research in nuclear and hadron physics, accelerator science and beam physics, and nuclear and radiochemistry. Graduate students in the Nuclear Science Division take part in these research activities.
*Illustrative imageQuark Nuclear Physics
Using the center's accelerators, the lab precisely measured the eta meson and found a candidate for a pentaquark baryon. It also uses photon beams to investigate how the properties of hadrons change inside atomic nuclei.
*Illustrative imageStructural Studies of Exotic Nuclei
Some short-lived exotic nuclei have unusual structures to which the conventional picture of stable nuclei does not apply. In collaboration with RIKEN, the lab has built an electron scattering facility dedicated to exotic nuclei and is studying their structure.
*Illustrative imageAccelerator Science and Beam Physics
Using a high-energy electron accelerator, the lab studies the fundamentals of beam physics, focusing on the motion of electrons in electromagnetic fields, especially nonlinear dynamics. It also works on improving the performance of the center's accelerators.
*Illustrative imageNuclear and Radiochemistry
Using chemical methods, the lab studies nuclear decay and nuclear reactions. It has observed a large change in the half-life of radioactive beryllium-7 encapsulated in C60, and is also studying the production of superheavy elements and the mechanisms of nuclear fission.
MembersFaculty
- ProfessorHiroaki Ohnishi
- ProfessorShigeru Kashiwagi
- Associate ProfessorHidetoshi Kikunaga
- Associate ProfessorMaya Shimomura
- Associate ProfessorFujio Hinode
- Associate ProfessorYuki Honda
- Assistant ProfessorAtsushi Tokiyasu
- Assistant ProfessorManabu Miyabe
- Assistant ProfessorToshikazu Hashimoto
- Assistant ProfessorTakuya Yokokita
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Diamond-Light-Source-Linear-Accelerator-01” Sintakso / CC BY-SA 4.0 (cropped)
- Quark Nuclear Physics: “Proton diagram” Cush, afgeleid werk: LukaBE / CC0 (cropped)
- Structural Studies of Exotic Nuclei: “Nuclear physics instruments” Unnerving duck / CC0 (cropped)
- Accelerator Science and Beam Physics: “Diamond-Light-Source-Linear-Accelerator-02” Sintakso / CC BY-SA 4.0 (cropped)
- Nuclear and Radiochemistry: “Radiochemistry Laboratory ( )” IAEA Imagebank / CC BY 2.0 (cropped)
- Related lab (核放射線物理): “CLEAR facility overview” Gedivad / CC BY-SA 4.0 (cropped)
- Related lab (分子物性物理): “Stable Levitation of a magnet on a superconductor” Julien Bobroff (user:Jubobroff), Frederic Bouquet (user:Fbouquet), LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Related lab (原子核理論): “Alpha-beta-gamma decay” Kailogical / CC BY-SA 4.0 (cropped)
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