Answer to a question for the Half-life of Lu nuclear cosmochronometer
| Project/Area Number |
21340068
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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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 | Japan Atomic Energy Agency |
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Principal Investigator |
HAYAKAWA Takehito 独立行政法人日本原子力研究開発機構, 量子ビーム応用研究部門, 研究主幹 (70343944)
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| Co-Investigator(Kenkyū-buntansha) |
SHIZUMA Toshiyuki 独立行政法人日本原子力研究開発機構, 量子ビーム応用研究部門, 研究主幹 (50282299)
MIYAMOTO Shuji 兵庫県立大学, 高度産業科学技術研究所, 教授 (90135757)
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| Co-Investigator(Renkei-kenkyūsha) |
KAWASE Keigo 独立行政法人日本原子力研究開発機構, 量子ビーム応用研究部門, 研究員 (60455277)
KAJINO Toshitaka 国立天文台, 理論研究部, 准教授 (20169444)
FUJIWARA Mamoru 大阪大学, 核物理研究センター, 准教授 (00030031)
YAMASHITA Katsuyuki 岡山大学, 地球物質科学研究センター, 准教授 (50322201)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2010: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2009: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
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| Keywords | 半減期 / s過程 / アイソマー / 宇宙核時計 / ルテチウム / 光核反応 |
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| Research Abstract |
For the problem of the Lu-176 half-life, we developed a detector system and introduced a laser system to generate laser Compton scattering gamma-ray beam. Ta-180 is a rare isotope and its astrophysical origin is unresolved question. We made a model to calculate the unstable ground state and meta-stable isomer. We concluded that the origin of Ta-180 can be explained by the supernova neutrino process. The origin of Sn-115 is also unknown. We have proposed Sn-115 has been produced by the s-process via a Cd-112 isomer and measured the neutron capture cross section.
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Report
(4 results)
Research Products
(21 results)
