• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2015 Fiscal Year Annual Research Report

電子非弾性散乱における干渉現象を利用した電子波動関数の位相プローブ法の開発

Research Project

Project/Area Number 25620006
Research InstitutionTohoku University

Principal Investigator

渡邉 昇  東北大学, 多元物質科学研究所, 准教授 (90312660)

Project Period (FY) 2013-04-01 – 2016-03-31
Keywords原子・分子物理 / 分子軌道 / 電子分光
Outline of Annual Research Achievements

分子軌道が有するプラスやマイナスの符号(位相)が、分子の反応性を決定づける強力な要因の一つであることが知られてきた。本研究の目的は、電子衝突による特定の軌道からのイオン化過程やRydberg軌道への電子遷移過程において生じる干渉現象を用い、電子波動関数の位相を実験的に決定する新規手法を開発することにある。
本年度は、電子衝撃イオン化断面積に現れる干渉効果より分子軌道形状の情報を抽出する解析法の確立を目指し、研究を展開した。この目的のため、六フッ化硫黄の非結合性軌道に着目し、電子運動量分光(EMS)実験より求めた干渉構造を詳細に調べた。六フッ化硫黄の5つの非結合性軌道は異なる方向を向いた複数のF 2p軌道の組み合わせにより構成され、その方向に応じた干渉構造を示す。実際、EMS実験より個々の分子軌道の形状を反映した特徴的な振動構造が得られ、我々の提案したモデルと実測値との比較から軌道の空間的な対称性を決定できることが分った。さらに、干渉構造の運動量原点での強度や振動の振幅から、分子軌道を構成する原子軌道の配向方向の揃い方や原子間軸に対する傾き角などに関する情報が得られることを明らかにしている。
以上の研究に加え、干渉効果のより定量的な解析を目的に、分子振動に起因した核変位にともなう電子波動関数の歪みが干渉構造に与える影響を調べた。上記の六フッ化硫黄に加え、ジメチルエーテルについてもEMS実験を行い、分子振動による軌道毎の電子運動量分布の変化を詳細に検証した。これらの研究結果は、学術論文として発表している。

  • Research Products

    (17 results)

All 2016 2015 Other

All Int'l Joint Research (1 results) Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Acknowledgement Compliant: 2 results,  Open Access: 5 results) Presentation (9 results) (of which Int'l Joint Research: 6 results)

  • [Int'l Joint Research] Hasselt University(ベルギー)

    • Country Name
      BELGIUM
    • Counterpart Institution
      Hasselt University
  • [Journal Article] Relationship between interference pattern and molecular orbital shape in (e, 2e) electron momentum profiles of SF62016

    • Author(s)
      N. Watanabe, M. Yamazaki, M. Takahashi
    • Journal Title

      Journal of Electron Spectroscopy and Related Phenomena

      Volume: 209 Pages: 78-86

    • DOI

      10.1016/j.elspec.2016.04.004

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Electron momentum spectroscopy of dimethyl ether taking account of nuclear dynamics in the electronic ground state2015

    • Author(s)
      F. Morini, N. Watanabe, M. Kojima, M. S. Deleuze, M. Takahashi
    • Journal Title

      The Journal of Chemical Physics

      Volume: 143 Pages: 134309-1-11

    • DOI

      10.1063/1.4931918

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Development of a method to measure molecular frame EELS cross sections2015

    • Author(s)
      N. Watanabe, S. Yamada, T. Hirayama, A. Seki, D. Suzuki, M. Takahashi
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 635 Pages: 072030

    • DOI

      10.1088/1742-6596/635/7/072030

    • Peer Reviewed / Open Access
  • [Journal Article] Herzberg-Teller vibronic effects on electron-impact excitations of N2O2015

    • Author(s)
      N. Watanabe, M. Takahashi
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 635 Pages: 072032

    • DOI

      10.1088/1742-6596/635/7/072032

    • Peer Reviewed / Open Access
  • [Journal Article] Analytical and molecular dynamical investigations of the influence of molecular vibrations upon the (e,2e) electron momentum distributions of furan2015

    • Author(s)
      F. Morini, M. S. Deleuze, N. Watanabe, M. Takahashi
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 635 Pages: 072010

    • DOI

      10.1088/1742-6596/635/7/072010

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Temperature dependence on VUV-absorption cross sections of CO2 molecule in the energy region of 10.6 - 11.8 eV2015

    • Author(s)
      M. Hoshino, M. Matsui, Y. Mochizuki, T. Odagiri, A. Kondo, K. Shigemura, M. Kitajima, N. Watanabe, J. Adachi, P. Limao-Vieira, H. Tanaka
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 635 Pages: 112055

    • DOI

      10.1088/1742-6596/635/11/112055

    • Peer Reviewed / Open Access
  • [Journal Article] EMS study of vibrational effects on electron momentum distributions of C2H4 and CH2F22015

    • Author(s)
      N. Watanabe, M. Yamazaki, M. Takahashi
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 635 Pages: 072031

    • DOI

      10.1088/1742-6596/635/7/072031

    • Peer Reviewed / Open Access
  • [Presentation] Two-center interference effects in (e, 2e) ionization of H2 and CO2 at large momentum transfer2015

    • Author(s)
      M. Yamazaki, I. Nakajima, H. Satoh, N. Watanabe, D. Jones, M. Takahashi
    • Organizer
      68th Gaseous Electronics Conference
    • Place of Presentation
      Honolulu, USA
    • Year and Date
      2015-10-12 – 2015-10-16
    • Int'l Joint Research
  • [Presentation] エチレンの電子運動量分布におけるbond oscillationの観測2015

    • Author(s)
      中島功雄、山崎優一、渡邉昇、高橋正彦
    • Organizer
      原子衝突学会第40回年回
    • Place of Presentation
      首都大学東京(東京都八王子市)
    • Year and Date
      2015-09-28 – 2015-09-30
  • [Presentation] SF6の電子運動量分布に現れる多中心干渉効果の研究2015

    • Author(s)
      渡邉昇、山崎優一、高橋正彦
    • Organizer
      原子衝突学会第40回年回
    • Place of Presentation
      首都大学東京(東京都八王子市)
    • Year and Date
      2015-09-28 – 2015-09-30
  • [Presentation] SF6の電子運動量分布における干渉効果の研究2015

    • Author(s)
      渡邉昇、山崎優一、高橋正彦
    • Organizer
      第9回分子科学討論会
    • Place of Presentation
      東京工業大学(東京都目黒区)
    • Year and Date
      2015-09-16 – 2015-09-19
  • [Presentation] Development of a method to measure molecular frame EELS cross sections2015

    • Author(s)
      N. Watanabe, S. Yamada, T. Hirayama, A. Seki, D. Suzuki, M. Takahashi
    • Organizer
      XXIX International Conference on Photonic, Electronic and Atomic Collisions
    • Place of Presentation
      Toledo, Spain
    • Year and Date
      2015-07-22 – 2015-07-28
    • Int'l Joint Research
  • [Presentation] EMS study of vibrational effects on electron momentum distributions of C2H4 and CH2F22015

    • Author(s)
      N. Watanabe, M. Yamazaki, M. Takahashi
    • Organizer
      XXIX International Conference on Photonic, Electronic and Atomic Collisions
    • Place of Presentation
      Toledo, Spain
    • Year and Date
      2015-07-22 – 2015-07-28
    • Int'l Joint Research
  • [Presentation] Herzberg-Teller vibronic effects on electron-impact excitations of N2O2015

    • Author(s)
      N. Watanabe, M. Takahashi
    • Organizer
      XXIX International Conference on Photonic, Electronic and Atomic Collisions
    • Place of Presentation
      Toledo, Spain
    • Year and Date
      2015-07-22 – 2015-07-28
    • Int'l Joint Research
  • [Presentation] Analytical and molecular dynamical investigations of the influence of molecular vibrations upon the (e,2e) electron momentum distributions of furan2015

    • Author(s)
      F. Morini, M. S. Deleuze, N. Watanabe, M. Takahashi
    • Organizer
      XXIX International Conference on Photonic, Electronic and Atomic Collisions
    • Place of Presentation
      Toledo, Spain
    • Year and Date
      2015-07-22 – 2015-07-28
    • Int'l Joint Research
  • [Presentation] Temperature dependence on VUV-absorption cross sections of CO2 molecule in the energy region of 10.6 - 11.8 eV2015

    • Author(s)
      M. Hoshino, M. Matsui, Y. Mochizuki, T. Odagiri, A. Kondo, K. Shigemura, M. Kitajima, N. Watanabe, J. Adachi, P. Limao-Vieira, H. Tanaka
    • Organizer
      XXIX International Conference on Photonic, Electronic and Atomic Collisions
    • Place of Presentation
      Toledo, Spain
    • Year and Date
      2015-07-22 – 2015-07-28
    • Int'l Joint Research

URL: 

Published: 2017-01-06  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi