Secondary Electron Ejection from Contaminated Metal Surface by He and Ar Atoms

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概要

• 論文の詳細を見る

• Secondary electron yields γ_0 on a contaminated Cu-Be surface for neutral He and Ar atoms of 19eV to 500eV have been measured. The neutral beams are produced from the ground state ion beams by charge transfer with the same kind of atoms. The yields γ_0 obtained are confirmed to be of the ground state atoms. The values of γ_0 are 0.58 for He and 0.24 for Ar at 500eV, and rapidly decrease to 6×10^<-6> for He and 2×10^<-6> for Ar at 19eV. The ejection mechanism is discussed. In the case of Ar, the secondary electron yield increases notably when the electron energy producing the primary ion beam is increased above 32eV. This indicates that metastable atoms Ar^m are produced from metastable ions Ar^<+m> by the charge transfer process Ar^<+m>+Ar→Ar^m+Ar^+. This fact can be used as a new technique of detecting metastable ions. An example of its application is presented.

• 社団法人応用物理学会の論文
• 1974-10-05

著者

• KANEKO Yozaburo

  Department of Physics,Faculty of Science,Tokyo Metropolitan University

• Kaneko Yozaburo

  Department Of Physics Faculty Of Science Tokyo Metoropoliton University

• KADOTA Kiyoshi

  Department of Electronics, Nagoya University

• Kadota Kiyoshi

  Department Of Electronics Nagoya University

• Kadota Kiyoshi

  Department Of Physics Faculty Of Science Tokyo Metropolitan University

関連論文

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• Enhancement of Surface Productions of CF_x Radicals by the Addition of H_2 into CF_4 Plasmas
• Loss Processes of F Atoms in Low-Pressure, High-Density CF_4 Plasmas with the Admixture of H_2
• Surface Kinetics of CF_x Radicals and Fluorine Atoms in the Afterglow of High-Density C_4F_8 Plasmas
• Lifetime Measurements of CF_x Radicals and H Atoms in Afterglow of CF_4/H_2 Plasmas
• Loss Processes of CF and CF_2 Radicals in the Afterglow of High-Density CF_4 Plasmas
• Estimation of Carbon Fluxes Interchanging between Chamber Wall and Gas Phase in Fluorocarbon Plasmas
• Synthesis of Heavy Carbon Clusters by Laser Ablation in Vacuum
• Spatial Distribution of H Atom Density in High-Density, Helicon-Wave H_2 Plasmas Measured by Laser-Induced Fluorescence
• Formation of Positive and Negative Carbon Cluster Ions in the Initial Phase of Laser Ablation in Vacuum
• Role of Reaction Products in F^- Production in Low-Pressure, High-Density CF_4 Plasmas
• Diagnostics of Fluorine Negative Ions by Laser Photodetachment Combined with a Heated Probe in High-Density CF_4 Plasmas
• High Resolution Translational Energy Spectroscopy of One-Electron Capture in Ne^-N_2 Collisions
• Drift Tube Study of One-Electron Capture Reactions between Double-Charged Ions and Rare Gas Atoms
• Drift Tube Study of Symmetric Resonance Single- and Double-Charge Transfer in Kr^++Kr,Xe^++Xe,Kr^+Kr,and Xe^+Xe Systems
• High Resolution Ion Energy-Loss Spectroscopy of Li^+-CO_2 Collisions
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• Vibrational Excitation of H_2, D_2, N_2 and O_2 by Li^+ Impact in the Energy Range from 100 eV to 1200 eV
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• On the Long-Lived Excited State of Ar II
• Study of Low Energy Charge Transfer Reactions of Ar^++N_2 and Ar^++O_2 by Time-of-Flight Technique
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• Mobility of Ar^+ Ions in He Gas at 82 K
• Mobilities of CO^+_2 and N_2O^+ Ions in Ne Gas
• Mobilities of Li^+, NO^+ and O^+_2 in N_2 and CO_2 Gases
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• Spatial Distribution of H Atom Density in High-Density, Helicon-Wave H2 Plasmas Measured by Laser-Induced Fluorescence
• Inelastic Collisions of Li+ on H2 and D2 Molecules(速報)
• An Improved Drift Tube Mass Spectrometry
• Dynamic Variation of the Sticking Coefficient of Oxygen Atoms in Helicon-Wave Excited High-Density Oxygen Plasmas
• Formation of Positive and Negative Carbon Cluster Ions in the Initial Phase of Laser Ablation in Vacuum
• Correlation between Metastable and Ground-State Fluorine Atom Densities Measured by Laser-Induced Fluorescence and Vacuum Ultraviolet Absorption Spectroscopies

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