Research Group:

Spin and Electron Momentum Densities

Overview of Research Group, Goals and Purposes:

This research community will play an active role for the support and development of the study using (magnetic) Compton scattering experiments performed in the beam-line BL08W. Currently, a high-resolution Compton scattering spectrometer with 115 keV x-ray and a magnetic Compton profile measuring equipment with 182 keV elliptically-polarized x-ray are installed in the beam-line, and both possess the highest-level performance in the world. These experiments enable us to measure electron and spin momentum densities of matter, and so electronic and orbital states have been investigated in various samples including high-Tc superconductors, heavy fermion materials, hydrogen storage alloys, shape-memory alloys, CMR materials, magnetic multilayer films, liquid matters, and molten metals. In order to consolidate the progress of these investigations, we will accumulate the knowledge and experience in Compton experiment and share them with the members of this community, and at the same time, strive to develop a fundamental technology for the future.
In addition, we intend to open up the research area with the help of the following advantages.
1) Compton experiment gives bulk information about electronic state of matter, since a high-energy x-ray is used in the measurement.
2) Compton experiment is practicable irrespective of the three state of matter (solid, liquid and gas)
3) Compton experiment has less restriction on the use of temperature, magnetic field, and pressure.
In the light of the above points, Compton experiment will be expected to be used on the industrial application such as nondestructive measurement, in-situ experiment and so on.

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