| Project/Area Number |
05680414
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
エネルギー学一般・原子力学
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| Research Institution | NAGOYA UNIVERSITY |
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Principal Investigator |
MORI Chizuo NAGOYA UNIVERSITY SCHOOL OF ENGINEERING,PROFESSOR, 工学部, 教授 (80023068)
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| Co-Investigator(Kenkyū-buntansha) |
URITANI Akira NAGOYA UNIVERSITY,SCHOOL OF ENGINEERING,ASSISTANT PROFESSOR, 工学部, 助手 (10213521)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1993: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | Iamging plate / Radiation classification / Energy classification / Latent image fading / Many sheets exposure / Many times reading / Natural radioactivity distribution measurement / Prompt scintillation / 放射線種弁別 / 即時発光 / 複数回読みとり法 / 潜像退行 / 熱ブリチング / 自然放射能測定 / バックグラウンド価減 / エネルギー損失割合 / 荷電子入射 |
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| Research Abstract |
1) Not only the study on the photo-stimulated luminescence, we investigated the prompt scintillation which is emitted on the nuclear radiation incidence. The ratio of photo-stimulated luminescence intensity to prompt scintillation intensity depends on the incident radiation kind and radiation energy. Also, this ratio is a function of specific energy loss (-dE/dx).
2) Imaging plate can be succeedingly read many times. The ratio of each reading to the first reading depends on the incident radiation kind and energy. Then, we can roughly classify the kind and energy by taking the ratio.
3) Very fine plutonium particle captured on a filter paper can be detected without any disturbance of radon and thoron daughters, and the particle size can be known.
4) Distribution measurements of very small amount of radioactive contamination in a hot laboratory and radioactivity on a rock surface can be done in an ordinary atmosphere without using a shielding box. The detectable radioactivity was down to -10^<-3> Bq/mm^2.
5) Extremely low level radioactivity distribution measurements were done for vegetables and meat in a graded shieding box with a thickness of 5-10cm of lead. This kind of results may give useful informations in the fields of botany, physiology, and archeology.
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