| Budget Amount *help |
¥148,200,000 (Direct Cost: ¥114,000,000、Indirect Cost: ¥34,200,000)
Fiscal Year 2022: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2021: ¥19,370,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥4,470,000)
Fiscal Year 2020: ¥31,980,000 (Direct Cost: ¥24,600,000、Indirect Cost: ¥7,380,000)
Fiscal Year 2019: ¥46,410,000 (Direct Cost: ¥35,700,000、Indirect Cost: ¥10,710,000)
Fiscal Year 2018: ¥33,280,000 (Direct Cost: ¥25,600,000、Indirect Cost: ¥7,680,000)
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| Outline of Final Research Achievements |
When a muon is introduced into a material, the muon is captured by an atom, and forms a muonic atom. After formation of a muonic atom, it emits muonic X-rays. In recent years, elemental analysis methods using muonic X-rays have been developed. This method can identify elements deeply inside of a material without sample destruction, and this method has been applied to analysis of valuable samples. The purpose of this research is to develop this method; by constructing a low-background measurement system, the detection limit of this method has been greatly improved, and even a 10 mg sample can be analyzed. As a result, we succeeded in analyzing the grains of the asteroid Ryugu. Furthermore, we have established a non-destructive three-dimensional elemental distribution analysis method by using a CdTe two-dimensional detector. By this experiment, it becomes possible to obtain three-dimensional elemental distributions of valuable archaeological materials in a non-destructive manner.
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