Absolute Total (Counting) and Charge-Separated Partial Cross-Sections for Electron Impact Ionization of La, Pr, Ho, Tm, and Lu Atoms(Atomic and Molecular Physics)

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概要

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• Electron impact ionization of La, Pr, Ho, Tm, and Lu Atoms has been studied through measurements of absolute total (apparent σ_a and counting σ_c) and charge-separated partial cross sections σ_<q+> (q=1-4) from the single ionization thresholds to 900 eV. The absolute and partial measurements were done using an electron-atom crossed beam apparatus and a magnetic deflection mass spectrometer, respectively. After a brief discussion on the present results, an overall discussion is made in more compact form on the cross-section results for 13 lanthanide-atom species including those for the 8 species treated in our previous studies. It is confirmed that the atoms having a 5d electron (La, Gd, and Lu) provide larger single-ionization cross sections and thereby larger σ_c values and larger population of singly-charged ions. It is also confirmed that resonance-like feature starting around the 4d limits is observed in the σ_<3+> curves for lighter lanthanide atoms. This phenomenon, observed for the first time for a neutral-atom series, is explained as the shape resonance occurring in the scattered-electron channel.

• 社団法人日本物理学会の論文
• 2005-12-15

著者

• OHTANI Shunsuke

  The University of Electro-Communications

• Nagata T

  Department Of Physics Aoyama-gakuin University

• KAYAMA Emi

  Department of Science and Technology, Meisei University

• TSUGE Satoshi

  Department of Science and Technology, Meisei University

• TOHYAMA Yuko

  Department of Science and Technology, Meisei University

• NAGATA Tetsuo

  Department of Science and Technology, Meisei University

• Ohtani Shunsuke

  Institute For Laser Science University Of Electro-communications

• Ohtani Shunsuke

  Cold Trapped Ions Project Icorp Jst:the University Of Electro-communications

• Shunsuke Ohtani

  Cold Trapped Ions Project Icorp Japan Science And Technology Corporation (jst)

• Nagata T

  Department Of Science And Technology Meisei University

• SHIMANO Akiko

  Department of Physics, Meisei University

• OBARA Satoshi

  Department of Physics, Meisei University

• Tohyama Yuko

  Department Of Science And Technology Meisei University

• Tohyama Yuko

  Department Of Physics Meisei University

• Shimano Akiko

  Department Of Physics Meisei University

• Tsuge Satoshi

  Department Of Science And Technology Meisei University

• Obara Satoshi

  Photon Factory Institute For Material Structure Science

• Obara Satoshi

  Department Of Applied Physics University Of Tokyo

• Nagata Tetsuo

  Department Of Physics Meisei University

• Ohtani Shunsuke

  Cold Trapped Ion Project Japan Science & Technology Cooperation

• OBARA Satoshi

  Department of Physics, Meisei University:(Present address)Photon Factory, IMSS, KEK

• KAYAMA Emi

  Department of Physics, Meisei University

• TSUGE Satoshi

  Department of Physics, Meisei University

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