| Budget Amount *help |
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
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| Outline of Final Research Achievements |
Intense X-rays alter the electronic state of materials on the femtosecond time scale. This makes it difficult to study the intrinsic property of materials using intense X-rays. In this project, the threshold below which the intrinsic X-ray absorption spectrum can be measured is determined experimentally. The threshold is not given by the fluence, which is considered to be important for the atomic system, but by an absorbed energy density. Using this new knowledge, two-photon absorption spectroscopy is performed for the first time in the X-ray region. In addition, resonant two-photon process is studied, and it is shown by analyzing the fluorescence spectra that the impact ionization process changes the electronic state.
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