| Project/Area Number |
26600138
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Quantum beam science
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| Research Institution | University of Tsukuba |
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Principal Investigator |
SASA Kimikazu 筑波大学, 数理物質系, 准教授 (20312796)
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| Co-Investigator(Kenkyū-buntansha) |
末木 啓介 筑波大学, 数理物質系, 教授 (90187609)
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| Co-Investigator(Renkei-kenkyūsha) |
MATSUNAKA Tetsuya 金沢大学, 環日本海域環境研究センター, 助教 (60731966)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 加速器質量分析法 / 炭素14年代測定 / CO2ガス負イオン源 / レーザーアブレーション / 量子ビーム / CO2ガスイオン源 / 加速器質量分析 / CO2ガス導入型負イオン源 |
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| Outline of Final Research Achievements |
We have developed a laser-ablation 14C accelerator mass spectrometry system for rapid 14C measurement on the 6 MV tandem accelerator at the University of Tsukuba. The first step in a process, we carried out tests to develop the rapid 14C measurement system, a gas ion source, a gas handling system, and an automatic sample preparation system. Technical innovation of AMS system for 14C is expected in terms of speed-up and high repeatability without graphite treatment in the sample preparation. An optimum CO2 flow ratio of 1.6 microliter/min. to the gas source was determined, and maximum 12C- current of 12 microampere was extracted from the gas source. The error of 14C/12C was 0.6%, and background of the gas source was 0.48±0.05 pMC (42,900 year BP). According to a study by the project, we found out potential in the gas ion source, the gas handling system and the automatic sample preparation system to allow the rapid 14C AMS measurement for interface of the laser-ablation 14C AMS system.
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