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Takamine Lab
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A nuclear physics lab that measures accelerator-produced unstable nuclei with ultimate precision.
AboutAbout the lab
Unstable nuclei, measured with ultimate precision
Takamine Lab conducts experiments that measure, with very high precision, unstable nuclei produced artificially by accelerators.
Unstable nuclei are a key to understanding how elements were formed in the universe, and their properties change greatly with even a slight difference in the number of protons or neutrons.
The lab first decelerates and cools unstable nuclei to extremely low energy, then performs high-precision mass measurements and laser spectroscopy.
Anyone with even a slight interest in the research is welcome to drop by the lab.
Key terms
- Unstable nuclei
- Atomic nuclei whose balance of protons and neutrons is off, so that they change into other nuclei in a short time
- Shell structure
- A structure in which the protons and neutrons inside a nucleus are divided into several energy levels (shells)
- Laser spectroscopy
- A method of shining laser light and examining in detail the light that atoms or ions absorb and emit, in order to learn their properties
NewsLab news
Precision mass measurements of argon isotopes reveal the strength of a new magic number (RIKEN press release)
Paper published in "Atoms"
Paper published in "Physical Review Research"
Takamine Lab launched at Institute of Science Tokyo
ResearchResearch themes
The lab decelerates and cools accelerator-produced unstable nuclei to extremely low energy and performs high-precision mass measurements and laser spectroscopy. In the future, it also hopes to take on the challenge of controlling atomic nuclei as quantum states.
*Illustrative imageProducing ultra-slow unstable nuclear beams
High-energy unstable nuclear beams are turned into very slow beams and extracted, using devices such as a helium gas catcher and an RF ion guide.
*Illustrative imageMulti-reflection time-of-flight mass spectrometry
The lab measures the masses of unstable nuclei with high precision. It explores how nuclear shell structure changes in unstable nuclei and where the elements originate.
*Illustrative imageLaser spectroscopy of unstable nuclei
This research performs precise laser spectroscopy of unstable nuclei. Using collinear laser spectroscopy and ion traps, it reveals the shape of atomic nuclei from measurements of hyperfine structure.
MembersFaculty
Takamine Lab members consist of faculty and undergraduate students.As of 2026
- ProfessorAiko TakaminePublications ↗
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Kuze LabSchool of Science, Department of PhysicsExperimental particle physics, high-energy physics, neutrino…The information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
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: “NuclideMap stitched 2” NuclideMap.PNG: The viewer derivative work: Neokortex (talk) / Public domain (cropped)
- Producing ultra-slow unstable nuclear beams: “Linear Paul ion trap” Coldsmokerider / CC BY-SA 4.0 (cropped)
- Multi-reflection time-of-flight mass spectrometry: “RIKEN Superconducting Ring Cyclotron P4208199” Kestrel / CC BY-SA 4.0 (cropped)
- Laser spectroscopy of unstable nuclei: “Fourier Transform, Beryllium Ions ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (中村研究室): “RIKEN Superconducting Ring Cyclotron P4213478” Kestrel / CC BY-SA 4.0 (cropped)
- Related lab (藤岡研究室): “J-PARC Hadron Experimental Facility 1” Kestrel / CC BY-SA 4.0 (cropped)
- Related lab (慈道研究室): “Quantum Fluctuations” Derek Leinweber / CC BY-SA 4.0 (cropped)
- Related lab (久世研究室): “Views of the LHC tunnel sector 3-4, tirage 2” Maximilien Brice (CERN) / CC BY-SA 3.0 (cropped)
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