| Project/Area Number |
22540498
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geochemistry/Astrochemistry
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
NAKAI Yoichi 独立行政法人理化学研究所, 仁科加速器研究センター, 専任研究員 (30260194)
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Naoki 北海道大学, 低温科学研究所, 教授 (50271531)
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| Co-Investigator(Renkei-kenkyūsha) |
KOJIMA Takao 独立行政法人理化学研究所, 山崎原子物理研究室, 専任研究員 (90211896)
HIDAKA Hiroshi 北海道大学, 低温科学研究所, 助教 (00400010)
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| Project Period (FY) |
2010-04-01 – 2013-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 大気イオン化学 / クラスターイオン / 微粒子核生成 / 原子分子物理 / 地球化学 / 大気エアロゾル |
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| Research Abstract |
Experimental study for cluster ion formation, early stages of ion induced nucleation, has been performed. We developed the experimental equipment, in which the region for production of initial ions is separated from that for generation of cluster ions, in order to define the reaction paths. Gibbs free energy changes for the stepwise association of an H2O molecule were measured for H3O+(H2O)n cluster ions and our method has provided more stable and precise results compared with previous measurements. In the use of initial NO+ ions, we have reduced influence of metastable NO+ ions in produced initial ions, using hydrogen buffer gas.
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