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1986 Fiscal Year Final Research Report Summary

Effects of Impurities in the Cycle of Muon Catalyzed Nuclear Fusion (muCF)

Research Project

Project/Area Number 60580180
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Nuclear engineering
Research InstitutionKyoto University

Principal Investigator

IMANISHI Nobutsugu  Institute of Atomic Energy, Kyoto University, 原子エネルギー研究所, 助教授 (10027138)

Co-Investigator(Kenkyū-buntansha) TAKEKOSHI Hidekuni  The Institute for Chemical Research, Kyoto University, 化学研究所, 教授 (90093260)
IWASAKI Matae  Institute of Atomic Energy, Kyoto University, 原子エネルギー研究所, 教授 (10160102)
Project Period (FY) 1985 – 1986
KeywordsMeson / Muon / Catalytic / Nuclear Fusion / Coulomb Capture / Transfer Process / Mesomolecule / エキゾチック粒子
Research Abstract

It is well known that a muon stopped in hydrogen catalytically induces nuclear fusion of deutron and triton. However, basic processes included in the fusion cycle are still an open problem. In our program, we studied the Coulomb capture process of exotic particles of muons and pions into molecular and atomic orbitals, and the transfer process of exotic particles X from a neutral <pX^-> to heavier atoms.
The experiments were carried out at the 12 GeV proton synchrotron facility in the National Laboratory for High Energy Physics. Capture probabilities of a pion in respective atoms constituting a molecule were measured by detecting pionic x rays with an intrinsic germanium detector for elements with atomic number Z greater than 2. For hydrogen, a gamma-ray pair from a decaying neutral pion produced through the charge exchange reaction between the pion and a proton were detected with large lead glass Cherenkov detectors.
A pion is caught into either an atomic orbital or a large mesomolecular orbital. The pion in mesomolecular orbital cascades down to an atomic orbital of constituting atoms through the Auger process. The probabilities of cascade process to the respective atoms depend on net atomic charges on the atoms.
In a binary gas mixture, a small neutral particle of <pX^-> formed following the exotic-particle capture in a hydrogen orbital can get into impurity gas and transfer the exotic particle to the atom. It has been found that this transfer process depends strongly on the molecular structure of the impurity gas.

  • Research Products

    (32 results)

All Other

All Publications (32 results)

  • [Publications] 今西信嗣: Physical Review A. 32. 2584-2590 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: Physical Review A. 35. 2044-2050 (1987)

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      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: Physical Review A. 35. (1987)

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      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: Nuclear Instruments and Methods in Physics Research. Submitted.

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      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: Physical Review A.

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      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: Tenth International Conference on Atomic Physics. 78-80 (1986)

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      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: XIII International Hot Atom Chemistry Symposium. (1987)

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      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: RCNP-P-86 Osaka University. 111-117 (1986)

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      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: High Energy Quarterly. 3. 21-25 (1986)

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      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: 京都大学原子エネルギー研究所廣報. 67. 38 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: 京都大学原子エネルギー研究所廣報. 68. 36 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: 京都大学原子エネルギー研究所廣報. 69. 47 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: 京都大学原子エネルギー研究所廣報. 70. 40 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: 京都大学原子エネルギー研究所廣報. 70. 41 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: 京都大学原子エネルギー研究所廣報. 71. 51 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 今西信嗣: 京都大学原子エネルギー研究所廣報. 71. 52 (1987)

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      「研究成果報告書概要(和文)」より
  • [Publications] Nobutsugu Imanishi: "Chemical-bond dependence of Coulomb capture of pions in beryllium borides" Physical Review A. 32. 2584-2590 (1985)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Chemical-bond dependence of Coulomb capture of pions in transition-metal borides" Physical Review A. 35. 2044-2050 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Chemical-bond dependence of Coulomb capture of pions in borides of light elements" Physical Review A. 35. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Measurements of the probability for pion capture by hydrogen in gas mixtures" Nuclear Instruments and Methods in Physics Research.

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      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Pion capture probabilities in alkali-metal tetrahydroborates" Physical Review A.

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      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Mesonic atoms and molecular structure (8) Chemical bond dependence of Coulomb capture" Bulletin of the Institute of Atomic Energy, Kyoto University. 68. 36 (1985)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Mesonic atoms and molecular structure (9) <B_4C> " Bulletin of the Institute of Atomic Energy, Kyoto University. 69. 47 (1986)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Mesonic atoms and molecular structure (10) Detection of mesonic hydrogen atom" Bulletin of the Institute of Atomic Energy, Kyoto University. 70. 40 (1986)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Mesonic atoms and molecular structure (11) Lithium hydride" Bulletin of the Institute of Atomic Energy, Kyoto University. 70. 41 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Mesonic atoms and molecular structure (12) Hydroxides" Bulletin of the Institute of Atomic Energy, Kyoto University. 71. 51 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "A model on the Coulomb capture of muons or pions in hydrides" Tenth International Conference on Atomic Physics. 79-80 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Chemical-bond dependence of Coulomb capture of pions in borides" XIII International Hot Atom Chemistry Symposium. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Exotic atoms and molecular structure" RCNP-P-86 Osaka University. 111-117 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Chemistry of <pi^-> Mesonic Atoms" High Energy Quarterly. 3. 21-25 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Mesonic atoms and molecular structure (7) X-ray spectra and orbital angular momentum" Bulletin of the Institute of Atomic Energy, Kyoto University. 67. 38 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobutsugu Imanishi: "Mesonic atoms and molecular structure (13) Coulomb capture process of pion in hydrides" Bulletin of the Institute of Atomic Energy, Kyoto University. 71. 52 (1987)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1988-11-09  

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