| Project/Area Number |
16540277
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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 | The Institute of Physical and Chemical Research |
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Principal Investigator |
YUKO Motizuki The Institute of Physical and Chemical Research, RI Physics Laboratory, Researcher (90332246)
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| Co-Investigator(Kenkyū-buntansha) |
MADOKORO Hideki RIKEN, RI Physics Laboratory, Researcher (60373370)
SHIMIZU Tetsuya RIKEN, Computational Biomechanics Project, Researcher (00291922)
TAMAGAWA Toru RIKEN, Cosmic Radiation Laboratory, Researcher (20333312)
TERADA Yukikatsu RIKEN, Cosmic Radiation Laboratory, Researcher (90373331)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2006: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2005: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2004: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | The origin of the elements / Nucleosynthesis / Core-collapse supernovae / The r-process nucleosynthesis / Uranium production / 超新星爆発 |
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| Research Abstract |
The origin of heavy elements from iron to uranium is a mystery. It is believed that such heavy elements were created by the rapid neutron capture process (the r-process), in which seed nuclei captures many neutrons very rapidly in a very short time. Core-collapse supernovae have been suggested for the last 50 years to be the first candidate to host the r-process nucleosynthesis. The biggest problem here is that, except a few cases, hydrodynamical simulations could not have produced high-enough entropy to lead to a successful r-process up to its 3rd peak. In this research, we have demonstrated that a 2-Dimensional hydrodynamical simulation can naturally attain such a high entropy required for the r-process. In addition, our models have features of neutron richness and a fast expansion. All of these are essential requirements for a successful supernova model to give an environment for the r-process nucleosynthesis. It is thus very promising to study the r-process nucleosyntheis based on our hydrodynamical simulations of core-collapse supernovae. In this research, we have also developed the base of nuclear reaction network supercomputing calculations, and have investigated the detection possibilities of nuclear gamma-rays from the r-process nuclides and electron-capture decay X-rays from titanium and nickel isotopes, with future Japanese X-ray satellites, NeXT and Suzaku, respectively.
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