1988 Fiscal Year Final Research Report Summary
Landau-Zener Effects in Nuclear Heavy-Ion Reactions
| Project/Area Number |
61540208
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
核・宇宙線・素粒子
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| Research Institution | Kyoto University |
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Principal Investigator |
ABE Yasuhisa Research Institute for Fundamental Physics, Kyoto University, 基礎物理学研究所, 助教授 (80000868)
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| Co-Investigator(Kenkyū-buntansha) |
TAZAWA Terutake Technical College, Yamaguchi University, 工業短期大学部, 教授 (80091198)
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| Project Period (FY) |
1986 – 1987
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| Keywords | Landau-Zener Effects / Heavy-Ion Nuclear Reactions / 共鳴機構 |
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| Research Abstract |
1. Investigations have been made on whether Landau-Zener level crossings in nuclear heavy-ion collisions cause resonance-like enhancements in transition cross sections. Semi-classical estimates were already shown by the head investigator to give enhanced cross sections corresponding to experiments. Quantum mechanical calculations have been performed with a simple two-level model, but have turned out to give only slight enhancements. In order to understand this difference, analytical treatments are now being pursuites, for example, by DWBA.
2. In order to perform the above investigations, we have developped a new formalism, i.e., a scattering formalism in the body-fixed frame, which enables us to accomodate 2-center shell model in scattering problem.
3. Furthermore, we have critically investigated the vibration-rotation models for molecular resonances. It has been shown that neglects of rotation-vibration couplings cause completely misleading results.
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