• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

The Theory of the Dynamics of Hadronic and Muonic Atoms

Research Project

Project/Area Number 12640399
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 物理学一般
Research InstitutionRIKEN (The Institute of Physical and Chemical Research)

Principal Investigator

SHIMAMURA Isao  RIKEN (The Institute of Physical and Chemical Research), Atomic Physics Laboratory, Senior Research Scientist, 原子物理研究室, 副主任研究員 (30013709)

Co-Investigator(Kenkyū-buntansha) KIMURA Mineo  Yamaguchi University, Faculty of Engineering, Professor, 工学部, 教授 (00281733)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2002: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2000: ¥1,100,000 (Direct Cost: ¥1,100,000)
Keywordsexotic atoms / anti protonic atoms / muon-catalyzed fusion / muonic atoms / anti matter / positron scattering / positronium / 異常長寿命反陽子原子 / ポジトロン消滅 / しきい則
Research Abstract

1.The effects of a strong laser field on the formation rate of antihydrogen in low-energy collisions between positronium with antiproton have been studied. The rate has been found to increase if the parameters for the laser field (e.g., intensity, frequency ; polarization) are appropriately chosen.
2.A simple diabatic-ionization model has been established to obtain the cross section for exotic atom formation approximately. It reproduces accurate quantum mechanical results for simple systems very well, and also makes it possible to obtain information on complex systems for which accurate calculations are impossible.
3.Extraordinarily long-lived exotic atoms were found experimentally only for helium, but the existence of and the possibility of the formation of long-lived exotic lithium and other exotic alkali atoms have been predicted theoretically.
4.Muon transfer from hydrogenlike muonic atoms to proton isotopes has been treated quantum mechanically in terms of the hyperspherical-coordinate coupled-channel (HSCC) equations to obtain extremely accurate cross sections.
5.Electron-positron pair annihilation in collisions of positrons with atoms and molecules has been studied by an entirely new theory using a complex potential. This leads to a threshold behavior that is very different from the well-known Wigner threshold law, and to newly found interference effects between direct and indirect annihilation processes.
6.Some particularly broad resonances in positron scattering by the helium ion predicted in the literature have been denied definitively by the accurate HSCC calculations and a new theoretical method for resonance analysis.
7.Photon-impact electron detachment from the positronium negative ions has been studied accurately by using the HSCC method. Rich resonance structure in the cross sections has been found.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] A.Igarashi, I.Shimamura, N.Toshima: "Photodetachment cross sections of the positronium negative ion"New Journal of Physics. 2. 17 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] R.J.Whitehead, J.F.McCann, I.Shimamura: "Laser-assisted formation of antihydrogen"Physical Review A. 64. 023401 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Tachikawa, I.Shimamura, R.J.Buenker, M.Kimura: "Bound states of positron with molecules"New Directions in Antimatter Chemistry and Physics (eds. C.M.Surko and F.A.Gianturco) (Kluwer Academic, Amsterdam). Chap.23. 437-450 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi, M.P.Faifman, I.Shimamura: "Nonadiabatically coupled hyperspherical equations applied to the collisional spin flip of muonic hydrogen"Hyperfine Interactions. 138. 77-83 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Tachikawa, I.Shimamura, R.J.Buenker, M.Kimura: "Positron binding by molecules"Nuclear Instruments and Methods B. 192. 40-41 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] R.J.Whitehead, J.F.McCann, Y.Teranishi, I.Shimamura: "Antihydrogen formation in collisions of antiprotons with positronium : The effects of a strong laser field"Nuclear Instruments and Methods B. 192. 42-43 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi, M.Kimura, I.Shimamura: "A unified treatment of positron annihilation and positronium formation"Physical Review Letters. 89. 123201 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi, M.Kimura, I.Shimamura, N.Toshima: "Inseparable positron annihilation and positronium formation in positron-atom collisions : Description in terms of an absorption potential"Physical Review A. 68. 042716 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] I.Shimamura: "Hyperspherical coupled-channel method for Coulomb three-body continuum processes"Frontiers in Atomic, Molecular and Optical Physics, A Special Volume for the 75th Year of the Indian Journal of Physics. 3. 141-170 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 五十嵐明則, 季村峯生, 島村 勲, 戸嶋信幸: "陽電子消滅とポジトロニウム生成:複素ポテンシャルによる統一的定式化"日本物理学会誌. 58. 528-532 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi, I.Shimamura: "Stable complex-rotation eigenvalues that correspond to no full resonances in scattering : Examples in positron scattering by the helium ion"Physical Review A. 70(印刷中). (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi, I.Shimamura, N.Toshima: "Photodetachment cross sections of the positronium negative ion"New Journal of Physics. 2. 17 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] R.J.Whitehead, J.F.McCann, I.Shimamura: "Laser-assisted formation of antihydrogen"Physical Review A. 64, No.2. 023401 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Tachikawa, I.Shimamura, R.J.Buenker, M.Kimura: "Bound states of positron with molecules"New Directions in Antimatter Chemistry and Physics(eds.C.M.Surko and F.A.Gianturco)(Kluwer Acdemic)(Amsterdam). Chap.23. 437-450 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi, M.P.Faifman, I.Shimamura: "Nonadiabatically coupled hyperspherical equations applied to the collisional spin flip of muonic hydrogen"Hyperfine Interactions. 138. 77-83 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Tachikawa, I.Shimamura, R.J.Buenker, M.Kimura: "Positron binding by molecules"Nuclear Instruments and Methods B. 192. 40-41 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] R.J.Whitehead, J.F.McCann, Y.Teranishi, I.Shimamura: "Antihydrogen formation in collisions of antiprotons with positronium : The effects of a strong laser field"Nuclear Instruments and Methods B. 192. 42-43 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi, M.Kimura, I.Shimamura: "A unified treatment of positron annihilation and positronium formation"Physical Review Letters. 89, No.12. 123201 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi, M.Kimura, I.Shimamura, N.Toshima: "Positron annihilation and positronium formation : Unified formulation in terms of complex potentials"Proceedings of the Physical Society of Japan. 58, No.7. 528-532 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] I.Shimamura: "Hyperspherical coupled-channel method for Coulomb three-body continuum processes"Frontiers in Atomic, Molecular and Optical Physics, A Special Volume for the 75th Year of the Indian Journal of Physics (eds.S.S.Bhattacharyya, S.C.Mukherjee)(Allied Publishers PVT) (New Delhi), 2003). Vol.3. 141-170 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi, M.Kimura, I.Shimamura, N.Toshima: "Inseparable positron annihilation and positronium formation in positron-atom collisions : Description in terms of an absorption potential"Physical Review A. 68, No.4. 042716 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi, I.Shimamura: "Stable complex-rotation eigenvalues that correspond to no full resonances in scattering : Examples in positron scattering by the helium ion"Physical Review A. 70, No.1(in press). (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Igarashi et al.: "Nonadiabatically coupled hyperspherical equations applied to the collisional spin flip of muonic hydrogen"Hyperfine Interactions. 138. 77-83 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Tachikawa et al.: "Positron binding by molecules"Nuclear Instruments and Methods B. 192. 40-41 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] R.J.Whitehead, et al.: "Antihydrogen formation in collisions of antiprotons with positronium : The effects of a strong laser field"Nuclear Instruments and Methods B. 192. 42-43 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Igarashi et al.: "A unified treatment of positron annihilation and positronium formation"Physical Review Letters. 89. 123201 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] R.J.Whitehead, J.F.McCann, I.Shimamura: "Laser-assisted formation of antihydrogen"Physical Review A. 64・2. 023401 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Tachikawa, I.Shimamura, R.J.Buenker, M.Kimura: "Bound states of positron with molecules""New Directions in Antimatter Chemistry and Physics," eds. C.M.Surko and F.A.Gianturco (Kluwer Academic, Amsterdam). Chap.23. 437-450 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Igarashi,I.Shimamura,and N.Toshima: "Photodetachment cross sections of the positronium negative ion"New Journal of Physics (http://www.njp.org). 2. 17.1-17.14 (2000)

    • Related Report
      2000 Annual Research Report

URL: 

Published: 2000-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi