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1999 Fiscal Year Final Research Report Summary

A theoretical study on resonance phenomena in electron capture by highly-charged ions from electronic-excited targets

Research Project

Project/Area Number 09640480
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 物理学一般
Research InstitutionNIIGATA UNIVERSITY

Principal Investigator

SHIMAKURA Noriyuki  Niigata University, Faculty of Science, Professor, 理学部, 教授 (40111314)

Project Period (FY) 1997 – 1999
Keywordsresonance phenomenon / multiply-charged ion / electron capture / low energy collision / electronic-excited target / wave-packet
Research Abstract

1. It is anticipated that resonance phenomena in electron-capture processes occur at higher collision energies as the charge of projectile ions and the dipole polarizability of targets become large. The cross sections of electron capture by highly-charged ions of Be, B, C, N, and O atoms from H, HィイD22ィエD2, and He targets were calculated. Resonances appeared at E ≦ 0.01 and ≦ 0.015 eV/amu in the (BeィイD13+ィエD1 + H) and (NィイD15+ィエD1 + H) systems, respectively.
2. Electronic-excited atoms have large dipole polarizability, so we calculated cross sections for electron capture processes from the electronic-excited targets. The results showed that the electronic-excited targets were not appropriate for the measurement of resonance because of the repulsion between its and other potential energy curves and because of undesirable transitions at many potential crossing points.
3. Alkali metal atoms have large dipole polarizability, so we calculated the cross sections for electron capture processes by BeィイD1q+ィエD1 and BィイD1q+ィエD1 ions (q = 2, 3) from alkali metal targets. In the (BeィイD12+ィエD1 + Li) system, resonance occurred at E ≦ 0.06 eV. So, for the systems of (highly-charged ions of He, Be, B, C, N, O + alkali metal atoms), the calculations of the cross section were continued. In the case of (HeィイD12+ィエD1 + Na) system, resonance appeared at E ≦ 0.3 eV.
4. In order to make clear the mechanism of resonance phenomena, some codes based on wave-packet were developed. The quantum-mechanical multi-channel time-dependent close-coupling method was applied to (NィイD15+ィエD1 + H) collision system. The formation of quasi-bound molecule, which stays at rovibrational state with long lifetime (0.5 psec - 20 psec), could be confirmed.

  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] S. Kita: "Excitation mechanisms in moderate-energy Li^+ - Ar collisions"Phys. Rev.. A55(5). 3504-3517 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Suzuki: "Magnetic field effects on electron capture processes by highly charged ions : collisions"Physica Scripta. T73. 110-111 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Suzuki: "Molecular-state treatment of electron capture in collisions of Be^<3+> ions with He atoms below 10keV amu^<-1>"J. Phys. B : At. Mol. Opt. Phys.. 31(8). 1741-1752 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Kita: "Charge-overlap effect on the electronic transitions in moderate-energy collisions between closed-shell particles with rare-gas structure"J. Chem. Phys.. 109(22). 9713-9718 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Suzuki: "Electron capture and excitations in collisions of Si^<2+> ions with He atoms at intermediate energies"Phys. Rev.. A60(6). 4504-4509 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Arimoto: "Unexpected reduction of spin-exchange cross section for fast ^3He^+ ion incident on Rb atom"European Physical J. D. 8. 305-308 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Kita: "Excitation mechanisms in moderate-energy Li^+-Ne collisions"Phys. Rev.. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Gotoh: "Excitation Mechanisms in Moderate-energy Li^+ - Ne and K^+ - Ne Collisions"Abstracts of Papers, XXth ICPEAC(Vienna). TH. 107-107 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Kita: "Excitation Mechanisms in Moderate-energy Collisions of Alkali Ions with Rare-gas Atoms"Abstracts of Papers, XXth ICPEAC(Vienna). TH. 108-108

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Suzuki: "Molecular-orbital Treatment of Electron Capture in Collisions of Be^<2+> and Be^<3+> Ions with He Atoms : Resonance Structure by Quasi-molecular States"Abstracts of Papers, XXth ICPEAC(Vienna). TH. 141-141

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Suzuki: "Resonances in electron capture by highly charged ions : A new method by using quantum-mechanical wave-packet model"Abstracts of Papers, XXIth ICPEAC(Sendai). TH. 102-102 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Suzuki: "The electron capture processes in collisions with He atoms and Be^<q+> (q=2, 3, 4) ions at low to intermediate collision energies"Abstracts of Papers, XXIth ICPEAC(Sendai). TH. 103-103 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Sakurai: "Electron capture and transfer-excitation processes in slow collisions of C^<6+> ions with He atoms"Abstracts of Papers, XXIth ICPEAC(Sendai). TH. 104-104 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Kita: "Excitation processes in moderate-energy K^+ - Ne collisions"Abstracts of Papers, XXIth ICPEAC(Sendai). MO. 116-116 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Suzuki: "Mutual neutralization processes in collisions between H^- ions and Na^+ ions in the energy range from 20 eV to 10 keV"Abstracts of Papers, XXIth ICPEAC(Sendai). TU. 092-092 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. Kita and N. Shimakura: "Excitation mechanisms in moderate-energy LiィイD1+ィエD1 - Ar collisions."Physical Review. A55. 3504-3517 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Suzuki, T. Shirai, and N. Shimakura: "Magnetic field effects on electron capture processes by highly charged ions : collisions of BィイD14+ィエD1 ions with H atoms."Physica Script. T73. 110-111 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Suzuki, N. Shimakura, T. Shirai, and M. Kimura: "Molecular-state treatment of electron capture in collisions of BeィイD13+ィエD1 ions with He atoms below 10 keV amuィイD1-1ィエD1."Journal of Physics B : At. Mol. Opt. Phys.. 31. 1741-1752 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Kita, T. Hasegawa, S. Gotoh, and N. Shimakura: "Charge-overlap effect on the electronic transitions in moderate-energy collisions between closed-shell particles with rare-gas structure."Journal of Chemical Physics. 109. 9713-9718 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Suzuki, N. Shimakura, J. P. Gu, G. Hirsch, R. J. Buenker, M. Kimura, and P. C. Stancil: "Electron capture and excitatios in collisions of SiィイD12+ィエD1 ions with He atoms at intermediate energies."Physical Review. A60. 4504-4509 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Arimoto, N. Shimakura, K. Yonehara, T. Yamagata, and M. Tanaka: "Unexpected reduction of spin-exchange cross section for fast ィイD13ィエD1HeィイD1+ィエD1 ion incident on Rb atom."Europian Journal of Phys.ics D. 8. 305-308 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Kita, S. Gotoh, N. Shimakura and S. Koseki: "Excitation mechanisms in moderate-energy LiィイD1+ィエD1-Ne collisions."Physical Review. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Gotoh, S. Kita, S. Nakamura, and N. Shimakura: "Excitation Mechanisms in Moderate-energy LiィイD1+ィエD1 - Ne and KィイD1+ィエD1 - Ne Collisions"Abstracts of Papers, XXth ICPEAC (Vienna), I. TH. 107 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Kita, S. Gotoh, and N. Shimakura: "Excitation Mechanisms in Moderate-energy Collisions of Alkali Ions with Rare-gas Atoms."Abstracts of Papers, XXth ICPEAC (Vienna), I. TH. 108 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Suzuki, N. Shimakura, T. Shirai, and M. Kimura: "Molecukar-orbital Treatment of Electron Capture in Collisions of BeィイD12+ィエD1 and BeィイD13+ィエD1 Ions with He Atoms : Resonance Structure by Quasi-molecular States."Abstracts of Papers, XXth ICPEAC (Vienna), I. TH. 141 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N. Suzuki, N. Shimakura, and H. Kono: "Resonances in electron capture by highly charged ions : A new method by using quantum-mechanical wave-packet model."Abstracts of Papers, XXIth ICPEAC (Sendai), I. TH. 102 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Suzuki, N. Shimakura, and T. Shirai: "The electron capture processes in collisions with He atoms and BeィイD1q+ィエD1 (q = 2, 3, 4) ions at low to intermediate collision energies."Abstracts of Papers, XXIth ICPEAC (Sendai), I. TH. 103 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Sakurai and N. shimakura: "Electron capture and transfer-excitation processes in slow collisions of CィイD16+ィエD1 ions with He atoms."Abstracts of Papers, XXIth ICPEAC (Sendai), I. TH. 104 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Kita, S. Gotoh, N. Shimakura, and B. I. Kikiani: "Excitation processes in moderate-energy KィイD1+ィエD1 - Ne collisions."Abstracts of Papers, XXIth ICPEAC (Sendai), I. MO. 116 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Suzuki, N. Shimakura, A. S. Dickinson, and J. F. McCann: "Mutual neutralization processes in collisions between HィイD1-ィエD1 ions and NaィイD1+ィエD1 ions in the energy range from 20 eV to 10 keV."Abstracts of Papers, XXIth ICPEAC (Sendai), I. TU. 092 (1999)

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

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Published: 2001-10-23  

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