| Budget Amount *help |
¥43,290,000 (Direct Cost: ¥33,300,000、Indirect Cost: ¥9,990,000)
Fiscal Year 2020: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2018: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2017: ¥14,300,000 (Direct Cost: ¥11,000,000、Indirect Cost: ¥3,300,000)
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| Outline of Final Research Achievements |
We have developed researches using the high-efficiency generation of positronium negative ions (bound state of one positron and two electrons) developed by the principal investigator. First, the quality of the variable energy positronium beam was improved. In this system, an energy-tunable positronium beam is generated by irradiating accelerated positronium negative ions with laser light to photodetach electrons. This study succeeded in producing a high quality positronium beam. Next, using this beam, the motion-induced resonance of positronium was observed for the first time. We also succeeded in measuring the binding energy of positronium negative ions for the first time. Both are extremely successful achievements in this field.
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