| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Neutron detectors with extremely high spatial resolution are having been developed for the measurement of position distribution of ultra-cold neutrons in quantized states in the earth’s gravitational field as tests of gravitational invers-square law and equality of gravitational and inertial mass.
A detector made by loading LiNO3 into fine-grained nuclear emulsion was exposed to thermal and cold neutrons and absorption events were detected. Its spatial resolution turned out to be about 0.5 micron, which is higher than other detectors by an order of magnitude. Its detection efficiency turned out to be as expected.
Another detector was made by coating 10B layer of 10nm-thick with fine-grained nuclear emulsion. Its spatial resolution should be several 10nm. It was exposed to cold neutrons, and absorption events were detected. Stabilization of 10B layer is proceeding.
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