| Project/Area Number |
15K17625
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 中性子 / 原子核散乱 / 中性子線源 / 暗黒物質探索 / キャリブレーション |
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| Outline of Final Research Achievements |
In this research, we developed a low energy neutron source for dark matter search. From Yttrium (Y88) and Beryllium9 (BeO ceramic), we can obtain almost monochromatic 152 keV neutron via photo-nuclear reaction. Obtained energy spectrum from this calibration source is similar to the few keV nuclear recoils expected from low-mass weakly interacting massive particles.
We developed this source and collected neutrons with helium 3 neutron counter and with XMASS-I experiment detector, which is a dark matter search experiment. Due to insufficient data taking time, it is hard to evaluate the scintillation efficiency and the scintillation decay time constant of this low energy neutron nuclear recoil, which was set for the purpose of this research. However, it was achieved to observe nuclear recoil-like signal from this calibration source.
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