| Project/Area Number |
23540342
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Osaka University |
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Principal Investigator |
SHIMA Tatsushi 大阪大学, 核物理研究センター, 助教 (10222035)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2011: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
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| Keywords | p-過程 / モリブデン92 / 能動標的 / 無機シンチレータ / 光核反応 / 放射化法 / 元素合成過程 / モリブデン / レーザー逆コンプトンガンマ線 / NaI(Tl)シンチレーション検出器 |
|---|
| Research Abstract |
92Mo is the most neutron-deficient nuclide in molybdenum isotopes, and is supposed to be produced via the p-process of the astrophysical nucleosynthesis. It has been a long-standing problem in nuclear astrophysics that the observed abundance of 92Mo is smaller by a factor of a few ten than the predicted value of the p-process theory. One of the possible reason for this discrepancy is the inaccuracy of the 92Mo(gamma,p)91Nb reaction cross section which has not been measured experimentally. We developed a new method for measurement of the 92Mo(gamma,p)91Nb cross section by using an inorganic scintillator including molybdenum as an active target. A high-sensitivity photo-activation analysis was also developed, and was successfully used for measurement of the 92Mo(gamma,p)91Nb reaction cross section using a quasi-monoenergetic laser Compton-scattered gamma-ray beam provided at the NewSUBARU synchrotron radiation facility of the University of Hyogo.
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