2014 Fiscal Year Final Research Report
Weak interaction processes in nuclei studied by means of strong interaction
| Project/Area Number |
22540310
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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 |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TAMII Atsushi (20302804)
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| Project Period (FY) |
2010-04-01 – 2015-03-31
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| Keywords | ガモフ・テラー遷移 / 元素合成 / 弱い相互作用・強い相互作用 / 荷電交換反応 / 高分解能実験 / (3He,t) 反応 / ベータ崩壊 |
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| Outline of Final Research Achievements |
It is surprising to see the large contribution of weak-interaction processes, especially the Gamow-Teller (GT) transitions, in the nucleosynthesis in the Universe. They play important roles, for example, at the time of Supernova Explosion, or Neutron Star Merger under the conditions of high temperature and density. However, the study of GT transitions by the weak-interaction processes themselves is difficult due to the weakness of the interaction and the small accessible energy region.
We found that the Charge-Exchange (CE) reactions behave like reversed beta decay under certain conditions. Therefore, they are the good probes to study GT transitions up to high excitations. We make detailed studies of GT transitions in various nuclei by using high-resolution (3He,t) reactions. Owing to the systematic studies, we started have the overview of GT transitions. They are the important inputs to understand the contributions of GT transitions in the nucleosynthesis.
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| Free Research Field |
原子核構造の実験的解明
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