| Budget Amount *help |
¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2019: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2017: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| Outline of Final Research Achievements |
It is considered that dark matter in the universe is coming to the Earth from the direction of Cygnus,thus a direction-sensitive detector is effective in searching for dark matter.It has been known that the scintillation light yields of ZnWO4 crystal depends on the direction of incident particles. We were able to confirm this property using neutrons which have no charge like dark matters. In addition, we discovered that the decay time of the scintillation depends on the incident direction as well as the light yields.Furthermore we cooled down the crystal to cryogenic temperature and the light yields and the temperature rise due to the particle incident were measured simultaneously. Then we confirmed the incident direction dependence of the light yields was similar to that of room temperature. We were also able to identify the type of incident particles.These results are opening the way for application as a dark matter detector.
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