Research Group:
Research group on Compton scattering
Contact:
| Koizumi Akihisa |
| University of Hyogo, 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297,Japann |
| Telephone: +81-791-58-0529 |
| akihisa（at）sci.u-hyougo.ac.jp |
Research Area:
Fundamental Characterization, Applied Materials, Measurements
Beamline:
BL08W, BL05XU
Overview of Research Group, Goals and Purposes:
Compton scattering experiments measure spin specific electron momentum distribution, which have unique features with compared to other experiments.
- Quantum states in ground-state can be measured in a wide momentum space, providing information about bulk electronic structure that can be directly compared to theoretical calculations, such as band calculations.
- Spin specific quantum states can be measured by using circularly polarized X-rays. Therefore, majority and minority spin states can be obtained separately.
- The high penetration property of high-energy X-rays enables measurement under extreme and combined conditions, including high (low) temperature, high pressure, and magnetic fields.
- Measurements of quantum states with high transmittance of high energy X-ray can be a new non-destructive testing (such as operando reaction distribution measurement of Li ion secondary battery)
Compton scattering experiments with monochromatic, high energy, high flux and circularly polarized X-rays, which are strongness of SPring-8 in the world, are very unique activity in the world. Therefore we carry out the following activity for the next plan of the SPring-8.
- We carry out basic research of quantum states in momentum space, which cause the function of materials, and collaborate with theory group.
- Imaging of quantum states: Visualization of Fermi surface, spin/orbital states of strongly corelated materials, high Tc materials, electrochemical reaction and so on.
- Extreme condition: Supercritical states, high energy density material, non-equilibrium materials.
- We develop new measurement technique by using Compton scattering and high transmittance of high energy X-rays
- We develop new non-destructive testing by using Compton scattering and high transmittance of high energy X-rays.(Ex. Operando measurements of electrochemical reaction distribution in a Li ion battery)
- We develope new new measurement technique such as magnetic imaging using Magnetic Compton scattering.
- New measurement technique for the next SPring-8 plan
- Data analysis using informatics
- 2D detector with energy discrimination for imaging
- High momentum resolution measurement
- Devices for circularly polarized X-rays
The renewal of experimental instruments will be considered because the present instruments are deteriorating.
We promote the progress of science and social challenges with collaborating with researchers. Furthermore we suggest the next plan for SPring-8II.