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Yamashita Lab
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A radiation chemistry lab that seeks to understand, control, and put to use the chemical reactions caused by radiation.
AboutAbout the lab
Radiation chemistry connecting life, nuclear energy, materials, and energy
The Yamashita Lab studies radiation chemistry and related fields.
Radiation chemistry covers not only the chemical reactions that radiation induces but also the related physics, biology, and applications.
The lab aims to control the randomness that characterizes radiation, so that radiation can be used actively rather than passively.
It takes on the challenge of elucidating the principles of the phenomena that radiation causes in various complex systems, such as biological systems and nuclear power systems.
Key terms
- Peptide
- A molecule made of several amino acids linked together. Its properties change depending on the order (sequence) in which they are linked.
- Radiolysis of water
- A phenomenon in which water absorbs the energy of radiation and decomposes, producing reactive molecules and radicals.
- Scintillator
- A material that emits light when struck by radiation. The light is used to detect the radiation.
NewsLab news
A student received the Best Oral Presentation Award at the International Conference on Radiation Chemistry
Assistant Professor Watanabe received the Young Researcher Excellent Presentation Award at the Symposium on Radiation Chemistry of the Japanese Society of Radiation Chemistry
A student received the Young Researcher Excellent Presentation Award at the Symposium on Radiation Chemistry of the Japanese Society of Radiation Chemistry
A student received the Excellence Presentation Award (Oral Presentation Category) from the Japanese Radiation Research Society
A student received the Young Researcher Excellent Presentation Award at the Symposium on Radiation Chemistry of the Japanese Society of Radiation Chemistry
ResearchResearch themes
The lab traces the phenomena caused by the energy that radiation deposits in matter from end to end, from initial events on the nanosecond scale to the changes that ultimately remain. It applies the findings to the production of useful substances and to functional materials, and also develops hardware and software for measurement and analysis.
*Illustrative imageDNA Damage by Radiation and Its Protection
The lab investigates the initial processes by which radiation damages DNA, focusing on the influence of the surrounding water. Using synthesized peptides to control contact with DNA, it is working to tune DNA's sensitivity to radiation.
*Illustrative imageRadiation-Induced Chemical Changes Inside Nuclear Reactors
The lab studies the behavior of halogen elements such as iodine, which take diverse chemical forms in the presence of radiation, and the effect of metal oxide nanoparticles in reactor coolant water on the radiolysis of water.
*Illustrative imageHarnessing the Energy of Radiation
Using the energy carried by radiation, the lab produces substances useful in industry, such as ammonia, and converts that energy into light. It also develops functional nanoparticles that emit light under radiation, such as scintillators.
*Illustrative imageReactions between Atomic Oxygen and Polymer Materials
In collaboration with researchers at JAXA and elsewhere, the lab studies how the fine structures that atomic oxygen creates on polymer surfaces come about. It is also interested in what happens at the ends of radiation tracks.
MembersFaculty
The Yamashita Lab consists of faculty members, doctoral, master's, and undergraduate students, administrative assistants, and temporary agency staff.As of 2026
- Associate ProfessorShinichi YamashitaPublications ↗
- Assistant ProfessorAkito WatanabePublications ↗
VoicesStudent voices
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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: “17 mCi Ac-225(NO3)3 at ORNL by Dr Andrew R Burgoyne” Dr Andrew R. Burgoyne / CC BY-SA 4.0 (cropped)
- DNA Damage by Radiation and Its Protection: “DNA-fragment-3D-vdW” Katrina Darline Posey / Public domain (cropped)
- Radiation-Induced Chemical Changes Inside Nuclear Reactors: “Iodine crystals into flask” Lobastov BM / CC BY-SA 4.0 (cropped)
- Harnessing the Energy of Radiation: “FZU scintillators 1” René Volfík / CC BY-SA 4.0 (cropped)
- Reactions between Atomic Oxygen and Polymer Materials: “MISSE-2” NASA / Public domain (cropped)
- Related lab (Sakaue Lab): “KEK Electron-Positron Linac P9024765” Kestrel / CC BY-SA 4.0 (cropped)
- Related lab (Ishikawa-Sato Lab): “The Art of Science 2018 finalists ( )” Oak Ridge National Laboratory（Jason Richards） / CC BY 2.0 (cropped)
- Related lab (Hasegawa Lab): “Table GWMorley” Gavin Morley / CC BY-SA 4.0 (cropped)
- Related lab (Shimazoe Lab): “PET Normal brain” US National Institute on Aging, Alzheimer's Disease Education and Referral Center / Public domain (cropped)
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