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Kitajima Lab
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The lab studies quantum phenomena that arise when light or electrons collide with atoms and molecules.
AboutAbout the lab
Understanding chemical reactions through atomic and molecular collisions
The Kitajima Lab studies quantum phenomena that occur when photons or electrons collide with atoms and molecules.
A chemical reaction is a process in which molecules collide, their bonds rearrange, and new molecules form.
To understand this, the lab investigates the motions of atoms and molecules caused by collisions, as well as pairs of quantum-entangled atoms produced in chemical reactions.
Key terms
- quantum entanglement
- A special link between two particles whose states cannot be separated. The whole cannot be described as a combination of its parts.
- synchrotron radiation
- Intense light emitted when electrons traveling at nearly the speed of light change direction. It can be used across a wide range, from ultraviolet light to X-rays.
- photoelectron spectroscopy
- A method that shines light on a sample and measures the energy of the electrons ejected, in order to probe the electronic states inside molecules.
NewsLab news
View More ↗ResearchResearch themes
Based on quantum mechanics and collision theory, the lab aims to understand chemical reactions from the standpoint of atomic and molecular collisions. It studies quantum phenomena that occur when photons or electrons are directed at atoms and molecules, and the motions of atoms and molecules that collisions induce.
*Illustrative imageMolecular orientation and reactions
The lab directs an electron beam at individual molecules whose orientation is known, to explore how molecular orientation relates to reaction. It is developing an experimental apparatus built around a distinctive analyzer called a toroidal analyzer.
*Illustrative imageCollisions with cold electrons
The lab directs electrons with energies below roughly room-temperature levels at atoms and molecules to study collisions in a regime governed solely by quantum mechanics. It has devised a method that uses synchrotron radiation to produce high-quality electron beams.
*Illustrative imagePhotoionization of molecules
Using high-resolution photoelectron spectroscopy with synchrotron radiation, the lab studies the process by which molecules absorb light and become ions. In hydrogen molecules, it has found phenomena that current mainstream theory cannot explain.
*Illustrative imageQuantum-entangled atom pairs
Quantum entanglement has long been thought to have nothing to do with chemistry. The lab predicted that entangled atom pairs form when a molecule breaks apart (dissociates), and confirmed it experimentally.
MembersFaculty
The Kitajima Lab consists of faculty members, graduate students, and undergraduate students.As of 2024
- Associate ProfessorMasashi KitajimaPublications ↗
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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: “Photoemission laboratory” Food95 / CC BY-SA 4.0 (cropped)
- Molecular orientation and reactions: “Sample holder in ultrahigh vacuum chamber for angle-resolved photoemission spectroscopy” Ponor / CC BY-SA 4.0 (cropped)
- Collisions with cold electrons: “Bending magnets inside the storage ring ( )” CLS Research Office from Saskatoon, Canada / CC BY-SA 2.0 (cropped)
- Photoionization of molecules: “Scienta5” Saiht / Public domain (cropped)
- Quantum-entangled atom pairs: “Hydrogen discharge” W. Oelen / CC BY-SA 3.0 (cropped)
- Related lab (大島・山﨑研究室): “LOA1” Ecole polytechnique / CC BY-SA 2.0 (cropped)
- Related lab (西野研究室): “Molecular Electronics ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (豊田研究室): “Anthracen” H. H. W. Preuß / CC BY-SA 4.0 (cropped)
- Related lab (近藤研究室): “Vaccuum line IMG 20230205” Jonathansammy / CC BY-SA 4.0 (cropped)
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