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Theoretical Study of Dynamical Processes in Highly Excited Molecules up to Double Ionization

Research Project

Project/Area Number 07640534
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 物理学一般
Research InstitutionKITASATO UVIVERSITY,SHOOL OF MEDICINE

Principal Investigator

TAKAGT Hidekazu  Kitasato Univ.School of Medicine, Assistant Professor, 医学部, 講師 (00129248)

Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1997: ¥100,000 (Direct Cost: ¥100,000)
Fiscal Year 1996: ¥100,000 (Direct Cost: ¥100,000)
Keywordsdissociative recombination / dissociative excitation / quantum defect theory / Lippmann-Schwinger equation / cooler ring / molecularrion・electron scattering / Hydrogen molecalar ion / He ium Hydride / リップマン・シュビンガー方程式 / クーラー・リング / 分子イオン・電子衝突 / 電離 / Kohnの変分法 / 水素分子 / HeH^+ / 超励起状態 / 二重電離 / 解離過程 / complex Kohnの変分法 / 光イオン化・解離
Research Abstract

I have done theoretical studies on the dynamic processes relevant to the highly excited electronic states, of which energies are near and higher than the 1st ionization potential. The processes mainly studied are dissociative recombination (DR) and dissociative excitation (DE). of which mechanism is common to the other processes as rotational and vibrational excitation by electron impact. There is strong, quantum mechanical, and high density coupling between electronic and nuclear motion in those processes. I developed some theoretical methods to represent those complex processes, and made clear the mechanism of those processes and availability of the present methods by numerical calculation. The studied molecular systems are H_2 and HeH and those isotopes, which are typical two systems controlled by quite different mechanisms.
In the DR if HD^+ + e, its mechanism changes with collision energy. At the lower energy, I investigated the process including the rotational motion and estimating precisely the effect of nonadiabatic electronic resonance scattering. This result the first to represent the experimental structures. At the higher energy, I calculated the DR and DE cross sections by introducing the discretized dissociative basis functions to the usual multichannel quantum defect theory. Besides obtaining the atomic data, I show the common mechanism between the DR and DE.
The present study shows the reason of large cross section in the DR of HeH^+, where the dissociative resonance state is absent. The nonadiabatic coupling between the dissociative states could be represented by introducing the idea of closed dissociative channel. The present calculation reproduce the experimental spectrum and isotope dependence for the first time.

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (37 results)

All Other

All Publications (37 results)

  • [Publications] T.Tanabe: "Dissociative Recombination of HD^+ with an Ultracold Electron Beam in a Cooler Ring" Phys.Rev.Lett.75・6. 1066-1069 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Tanabe: "Dissociative Recombination of HeH^+ and I^+S Isotopec Variants with a Ultracold Electron Beam from Superconducting Electron Cooler in a Storage Ring." J.Phys.B. 31(印刷中). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 高木 秀一: "分子イオン・電子衝突実験の動向に対する理論の現状" 原子核研究. 41・2. 99-108 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Takagi: "Theoretical Study on the Dissociative Recombination and Dissociative Excitation of Hydrogeu Molecular Ion" Afomic Collision Research in Japan. 21. 6-7 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Takagi: "Dynamic Processes in H^+_2/D^+_2+e Collisions with the Energy up to 10eV" International Conferance on the Physics of Electronic and Atomic Collisions,abstract. 19. 581-581 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Takagi: "The Reason of Large Crosssection in the Dissociative Recombination of HeH^+" International Conferance on the Physics of Electronic and Atomic Collisions,abstract. 20. Tu152-Tu152 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Takagi: "Dissociative Recombination:Theory,Experiments and Applications III" World Scientific 社, 256(20) (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Tanabe: "The Physics of Electronic and Atomic Collisions" American Institute of Physics (AIP conference proceedings360), 900(10) (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Tanabe, I.Katayama, H.Kamegaya, K.Chida, Y.Arakaki, T.Watanabe, M.Yoshizawa, M.Saito, Y.Haruyama, K.Hosono, K.Hatanaka, T.Honma, K.Noda, S.Ohtani, and H.Takagi: "Dissociative recombination of HD^+ with an ultracold electron beam in cooler ring" Phys.Rev.Lett.75. 1066-1069 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Tanabe, I.Katayama, S.Ono, K.Chida, T.Watanabe, Y.Arakaki, Y.Haruyama, M.Saito, T.Odagiri, K.Hosono, K.Noda, T.Honma, and H.Takagi: "Dissociative recombination of HeH+ isotopes with an ultracold electron beam from a superconducting electron cooler in a storage ring" J.Phys.B. 31 (letter to the editor) (in printing). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Takagi: "Theoretical study of dissociative processes in HD^+/H_2^+-e collisions with the energy up to 10 eV" Dissociative Recombination ; Theory, Experiment, Applications III,Editors ; D.Zajfman, J.B.A.Mitchell, D.Schwalm and B.R.Rowe (Wold Scientific). 174-183 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Tanabe, I.Katayama, H.Kamegaya, K.Chida, Y.Arakaki, T.Watanabe, M.Yoshizawa, M.Saito, Y.Haruyama, K.Hosono, K.Hatanaka, T.Honma, K.Noda, S.Ohtani, and H.Takagi: "Dissociative recombination of light molecular ions in the strage ring TARN II" Dissociative Recombination ; Theory, Experiment, Applications III,Editors ; D.Zajfman, J.B.A.Mitchell, D.Schwalm and B.R.Rowe (Wold Scientific). 84-93 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Hidekazu Takagi: "The reason of large cross section in the dissociative recombination of HeH^+" Abstracts of contributed papers on the 20th International Conference on the Physics of Electronic and Atomic Collisions, Viena, Austria. TU152. (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Tanabe, I.Katayama, S.Ono, K.Chida, T.Watanabe, Y.Arakaki, Y.Haruyama, M.Saito, T.Odagiri, K.Hosono, K.Noda, T.Honma, I.Nomura, and H.Takagi: "Dissociative recombination of molecular ions with a l meV temperature electron beam from a super-conducting elecron cooler at the TARN II storage ring" Abstracts of contributed papers on the 20th International Conference on the Physics of Electronic and Atomic Collisions, Viena, Austria. TU132. (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Hidekazu Takagi: "Dynamical processes in H_2^+ +e collision with the energy up to 10 eV" Abstracts of contributed papers on the 19th International Conference on the Physics of Electronic and Atomic Collisions, Wistler, canada. 581 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Tanabe, I.Katayama, H.Kamegaya, K.Chida, T.Watanabe, Y.Arakaki, M.Yoshizawa, M.Saito, Y.Haruyama, K.Hosono, K.Hatanaka, T.Honma, K.Noda, S.Ohtani, and H.Takagi: "Dissociative recombination of molecular ions in a cooler ring" AIP conference proceedings. 360. 329-338 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Hidekazu Takagi: "Today's theory concerning on the experiments of electron-molecular ion collisions (in Japanese)" Gennsikaku Kenkyu. 41(2). 99-108 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Tanabe: "Dissociative Recombination of HD^+ with an Ultra cold Electron Beam in a Cooler Ring" Phy.Rev.Lett.75・6. 1066-1069 (1995)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Tanabe: "Dissociative Recombination of HeH^+ and Its Isotopic Variants with a Ultracold Electron Beam from Superconducting Electron Cooler in a Storage Ring" J.Phy.B. (印刷中). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 高木秀一: "分子イオン、電子衝突実験の動向に対する理論の現状" 原子核研究. 41・2. 99-108 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.TAKAGI: "Theoretical Study on the Dissociative Recombination and Dissociative Excitation of Hydrogen Molecular Ion" Atomic Collision Research in Japan. 21. 6-7 (1995)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.TAKAGI: "Dynamical Processes in H_2^+/HD^++e Collisions with the energy up to 10eV" International Conference on the Physics of Electronic and Atomic Collisions,abstrad. 19. 581-581 (1995)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.TAKAGI: "The Reason of Large Crosssection in the Dissociative Recombination of HeH^+" International Conference on the Physics of Electronic and Atomic Collisions,Abstruct. 20. Tu152-Tu152 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Takagi: "Dissociative Recombination:Theory,Experiment and Applications III" D.Zajfman,J.B.A.Mitchell,D.Schwalm,B.R.Rowe編集,World Scientific社, 256(20) (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Tanabe: "The Physics of Electronic and Atomic Collisions" American Institute of Physics (AIP conference proceedings 360), 900(10) (1995)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Tanabe et al: "Dissociative Recombination of HD^+ with an ultracold electron beam in a cooler ring" Phy.Rev.Lett.75. 1066-1069 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 高木秀一: "電子衝突実験の動向に対する理論の現状" 原子核研究. 41. 99-108 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Takagi: "Theoretical study on the dissociativerecombination and dissociative excitation of hydrogen moleaile con." Atomic Collision Research in Japan. 21. 6-7 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] Hidekazu Takagi: "Dissociative Recombination,Theory,Experimentond Applications III" editors D.Zaifman et al,World Scientific, 254(10) (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Tanabe: "Dissociative recombination of HD^+ with an ultracooled electron beam in a cooler ring" Phys.Rev.Lett.75. 1066-1069 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Takagi: "Theoretical study on the dissociative recombination and dissociative excitation of hydrogen molecular ion" Atomic Collision Research in Japan,progress report. 21. 6-7 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Takagi: "Dynamical processes in H_2^+/HD^++e collisions with the energy up to 10eV" 19th International Conference on the physics of electronic and Atomic Collisions,abstracts. 581-581 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Takagi: "Theoretical study of dissociative processes in HD^+ +e collisions below 10eV" International Symposium on Electron-and Photon-Molecule Collisions and Swarms,abstracts. D-3-D-4 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 高木秀一: "分子イオン・電子衝突における解離の機構" 宇宙空間原子分子過程研究会,文部省宇宙科学研究所報告書. 35-38 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 高木秀一: "分子イオン.電子衝突実験の動向に対する理論の現状" 原子核研究. (出版予定). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Takagi: "Dissociaative Recombination:Theory,Experiment and Applications(分担執筆)" World Scientific, 300(20) (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Tanabe: "AIP Conference Proceedings(分担執筆)" American Institute of Physics(New York), 10 (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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