| Budget Amount *help |
¥22,230,000 (Direct Cost: ¥17,100,000、Indirect Cost: ¥5,130,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥14,820,000 (Direct Cost: ¥11,400,000、Indirect Cost: ¥3,420,000)
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| Outline of Final Research Achievements |
A measurement instrument for immediate response to affairs in which people have concern for spread of contamination by pure-beta emitter such as Sr/Y-90 was developed, especially in case of low-level radioactivity concentration. As a component of the instrument, a small-size plastic scintillation detector for beta ray counting was used in evaluation. Coupled with the beta ray detector, a through-hole type NaI(Tl) scintillation detector was manufactured. Measurement accuracy, precision and minimum detectable activity were estimated in measurement for actual results using a mock source. A simulation technique was built up to estimate efficiency of these detectors for counting beta and gamma ray from radioisotopes.
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