Development of Post-ionization method for next-generatino in-situ U-Pb dating mass spectrometer
| Project/Area Number |
26610183
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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 |
Geochemistry/Cosmochemistry
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| Research Institution | Osaka University |
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Principal Investigator |
Terada Kentaro 大阪大学, 理学(系)研究科(研究院), 教授 (20263668)
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| Co-Investigator(Kenkyū-buntansha) |
石原 盛男 大阪大学, 理学(系)研究科(研究院), 准教授 (30294151)
中村 亮介 大阪大学, 産学連携本部, 講師 (70379147)
豊田 岐聡 大阪大学, 理学(系)研究科(研究院), 教授 (80283828)
青木 順 大阪大学, 理学(系)研究科(研究院), 助教 (90452424)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 局所分析 / 太陽系年代学 / 年代測定 / 同位体 / 局所同位体分析 / 隕石 / SIMS |
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| Outline of Final Research Achievements |
Secondary Ion Mass Spectrometers (SIMSs), which have high spacial resolution (1~10 micron), have been used for isotopic measurement of individual minerals and/or presolar grains. The weakest point of this analytical method is that secondary ion yield is very low (less than 1 %). As a result, a large amount of sputtered atoms and molecules that are neutral are wasted.
To overcome this weakness of SIMSs, we adopted the post-ionization method using high-intensity laser, and have developed a multi-turned TOF-SIMS with a femto-second laser for post-ionization. By optimizing the timing of irradiation/acceralation and/or position of laser, we currently attain the multiplication factor of c.a. 10000. As a result, we succeeded in detection of U and Pb ions from natural zircon of which U concentration is about 100 ppm.
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Report
(3 results)
Research Products
(12 results)
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[Presentation] DEVELOPMENT ON MULTI-TURNED TOF SIMS WITH A FEMTO-SECOND LASER FOR POST-IONIZATION: FIRST APPICATION TO EXTRATERRESTRIAL MATERIALS2016
Author(s)
Terada, K., Kawai, Y., Toyoda, M., Ishihara, M., Aoki, J., Yabuta, H., Suwa, T. and Nakamura, R.
Organizer
47th Lunar and Planetary Science Conference
Place of Presentation
ヒューストン（米国）
Year and Date
2016-03-21
Related Report
Int'l Joint Research
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[Presentation] Development on the Post-Ionization method for next-generation SIMS2015
Author(s)
Terada, K., Kawai, Y., Toyoda, M., Ishihara, M., Aoki, J., Nakamura, R.
Organizer
Japan-Korea SHRIMP workshop
Place of Presentation
広島大学（広島県・東広島市）
Year and Date
2015-09-14
Related Report
Int'l Joint Research
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