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Emission of Highly-Charged Ions from Solid Bombarded by Energetic Heavy Io

Research Project

Project/Area Number 02808040
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  Kyoto University, Faculty of Engineering, Professor, 工学部, 教授 (10027138)

Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1991: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1990: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsHighly-Charged Ions / Sputtering / Accelerator / Ion-Solid Interaction / Ion Source / Cluster Ions / Elastic Collision / Inelastic Collision / 反跳イオン / 多重電離 / スパッタ / フラスタ-イオン
Research Abstract

The aim of the present study is to produce low-energy highly-charged ions with low momentum dispersion. For the purpose, we bombarded solid surface with energetic heavy ions and measured the yields of various secondary ions.
In an energy range below several tens keV, particles are sputtered efficiently from solid target but few particles are charged. The sputtering is caused by cascade elastic collisions. In a MeV energy range, however, inelastic collision overcones the elastic collision and atoms in the target are ionized. If the ionized atoms on. an outermost atomic layer are recoiled by other low-energy secondary atoms, they probably carry charges and move slowly. Therefore, we measured systematically the yields of secondary charged particles as a function of incident energy of heavy ions. Used targets were metallic ones such as C. Al, Ti, Ni, Cu, Ho, W and Au, and an insu ator Al_2O_3. Incident partilces were-C, Si and Ge ions. The following conclusions are obtained :
1. Singly-charged ions are. produced by the elastic cascade collision. their yield decreases. monotonically with increasing energy.
2. The yields of highly-charged secondary ions increase at first and then decrease with energy. The maximun yields are at energies where the elastic and inelastic collisions compete.
3. Other than atomic ions, various cluster ions are observed. The yields decrease monotonically and then increase with energy at the energy range where the inelastic collision is predominant.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 岩沢 康司: "HeavyーIon Rutherford Backscattering SpectroーmetryーA Comparizon of ^<11>B with ^4He Ionsー" Memoirs of the Faculty of Engineering Kyoto University. LII. 297-310 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 大平 俊行: "Angular Dependence of Neutral Fractions of 50ー250 keV Hydrogen Emerging from NiSi_2(111) Surface" Radiation Effects and Defects in Solids. 117. 113-118 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 斉藤 学: "Cross Sections of Charge Exchange for He Ions through Zn Vapor" Journal of Physical Society of Japan.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 大平 俊行: "Zt Oscillations of Equilibrium Charge State Distributions of 50ー500 keV/u Hydrogen and Boron Ions Emerging from Solids" Physical Review.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 佐倉 直喜: "Emission of Secondary Ions from Aluminun Oxide Bombarded by Energetic Heavy Ions" Nuclear Instruments and Methods in Physics Research.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 今西 信嗣: "電荷変換衝突過程と固体表面" 表面科学. 12. 86-91 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K. Iwasawa etal: "Heavy-Ion Rutherford Backscattering Spectrometry-A Comparizon of ^<11>B with ^4He Ions-" Memoirs of the Faculty of Engineering Kyoto University. LII. 297-310 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Ohdaira etal: "Angular Dependence of Neutral Fractions of 50-250 keV Hydrogen Emerging from NiSi_2(111) Surface" Radiation Effects and Defects in Solids. 117. 1991 (113-118)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Saito etal.: "Cross Sections of Charge Exchange for He Ions through Zn Vapor" Jouranal of Physical Society of Japan.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Ohdaira etal.: "Zt Oscillations of Equilibrium Charge State Distributions of 50-500 keV/u Hydrogen and Boron Ions Emerging from Solids" Physical Prview.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N. Sakura etal.: "Emission of Secondary Ions from Aluminun Oxide Bombarded by Energetic Heavy Ions" Nuclear Instruments and Methods in Physics Research.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N. Imanishi eatl.: "Charge Changing Collision and Solid Surface (Japanese)" Surface Science. 12. 86-91 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 岩沢 康司: "HeavyーIon Rutherford Backscattering SpectrometryーA Comparison of ^<11>B with ^4lte lons" Memoirs of the Faculty of Engineering Kyoto University. 52. 297-310 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 大平 俊行: "Angular Dependence of Neutral Fractions of 50ー250 keV Hydrogen Emerging from NiSiz (III) Surface" Radiation Effects andDefects in Solids.

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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