| Project/Area Number |
01460261
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nuclear engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
NAKAMURA Takashi Tohoku University, CYRIC, Professor, サイクロトロン・ラジオアイソトープセンター, 教授 (70026029)
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| Co-Investigator(Kenkyū-buntansha) |
IMAMURA Mineo University of Tokyo, INS, Associate Professor, 原子核研究所, 助教授 (10011701)
YAMADERA Akira Tohoku University, CYRIC, Research Associate, サイクロトロン・ラジオアイソトープセンター, 助手 (90004465)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥5,500,000 (Direct Cost: ¥5,500,000)
Fiscal Year 1990: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1989: ¥3,000,000 (Direct Cost: ¥3,000,000)
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| Keywords | Enriched Isotope / Activation Cross Section / Excitation Function / Accelerator Mass Spectrometry / High Energy Neutron / Long-Lived Nuclide |
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| Research Abstract |
We Produced semi-monoenergetic neutron beams of energy of 15 to 40 MeV from 1- to 2-mm thick Be and enriched ^7Li targets bombarded by 20- to 40-MeV proton beams extracted from the SF cyclotron of Institute for Nuclear Study, University of Tokyo. By irradiating this neutron beam into the samples of ^<27>A1, ^<16>O, ^<nat>Si and ^<14>N, we measured the production rates of long-lived nuclides of ^<26>A1 (7.2x10^5 y), ^<14>C (5730 y) and ^<10>Be (1.6x10^5 y) with the surface barrier silicon detector coupled with the mass analysis line fixed on the Tandem Van-de Graaf of Research Center of Nuclear Science and Technology, University of Tokyo. We could firstly obtain the excitation functions of ^<27>A1 (n. 2n)^<26>A1, ^<16>O (n, 2pn)^<14>C, ^<nat>Si (n, pXn)^<26>A1 and ^<14>N (n, 2n3p)^<10>Be reactions and their maximum values were about 100mb, 5mb, 30mb and 10mb, respectively.
We subsequently irradiated several enriched samples by using P-^7Li monoenergetic neutrons and obtained their activation cross sections.
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