2016 Fiscal Year Final Research Report
r-process neutron capture theory based on nuclear many-body methods
| Project/Area Number |
26400268
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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 | Niigata University |
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Principal Investigator |
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| Research Collaborator |
Zhang Ying 天津大学, 助教
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 中性子捕獲反応 / 中性子過剰核 / 対相関 / 連続状態ＱＲＰＡ理論 / 準粒子共鳴 |
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| Outline of Final Research Achievements |
We have constructed a many-body theory of direct neutron capture reaction relevant for the r-process nucleosynthesis on the basis of the coordinate-space Hartree-Fock-Bogoliubov theory and the continuum quasiparticle random phase approximation. A notable feature is that the theory can describe impact of the neutron superfluidity (the pair correlation) and low-lying collective excitations on the capture cross sections. We have studied also pairing effects on neutron low-energy scattering state, which is an initial state of the capture reaction. It is found that the neutron pair correlation reduces the width of the quasiparticle resonance in certain conditions, and also that it brings about unusual resonance-like behaviors in the s-wave neutron.
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| Free Research Field |
原子核理論
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