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1987 Fiscal Year Final Research Report Summary

Site-specific photochemistry following soft x-ray irradiation

Research Project

Project/Area Number 61470018
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 構造化学
Research InstitutionNational Laboratory for High Energy Physics

Principal Investigator

TANAKA Kenichiro  National Laboratory for High Energy Physics, 放射光実験施設, 助教授 (90106162)

Co-Investigator(Kenkyū-buntansha) YAGISHITA Akira  National Laboratory for High Energy Physics, 放射光実験施設, 助手 (80157966)
OHTA Toshiaki  National Laboratory for High Energy Physics, 放射光実験施設, 客員教授 (80011675)
ITO Kenji  National Laboratory for High Energy Physics, 放射光実験施設, 助手 (60151502)
Project Period (FY) 1986 – 1987
KeywordsPhotochemistry / Core excitation / Threshold electron / Auger electron
Research Abstract

Soft x ray absorption in a molecule involving ionization of a core electron usually results in a fragmentation of molecule. The fragmentation has often been observed to occur specifically around the site of the atom where the core electron excitation takes place. Based on these observations one might consider the use of tunable soft x rays to stimulate chemical reactions or to selectively break large organic molecules, as one pleases.
From this point of view, in this project we have designed and constructed a new experimental apparatus involving an Auger electron analyser, a threshold electron analyser, and a mass spectrometer to elucidate the full mechanism of a soft x ray photochemistry of the adsorbed molecules on the surfaces. Using this apparatus, we have succeeded in detecting both Auger electrons and ionic products of photo-stimulated desorption in a oxygen/Cu system. We have also found that the fragmentation pattern following soft x ray irradiation changes whether the exctation energy is lower or higher than the ionization limit of a core electron.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Hitoshi Koizumi: Journal of Chemical Physics. 85. 4276-4279 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Zudenek Herman: Journal of Chemical Physics. 85. 5705-5710 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kenji,Honma: Journal of Chemical Physics. 86. 688-692 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hitoshi Koizumi: Radiation Physics and Chemistry. 32. 111-115 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Inosuke Koyano: Faraday Discussions of the Chemical Society. 84. (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shin Arai: Journal of Chemical Physics. 88. (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 田中健一郎 他: "シンクロトロン放射利用技術" (株)サイエンスフォーラム, 450 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kenji Honma et al.: "State selected ion-molecule reactions by the TESICO technique. VIII. Vibrational state dependence of the cross sections in the reaction C_2D_2^+(v_2) + H_2." Journal of Chemical Physics. 86. 688-692 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hitoshi Koizumi et al.: "Ionization efficiencies of C_3H_6, C_4H_8, C_2H_6O, and C_3H_3O isomers." Radiation Physics and Chemistry. 32. 111-115 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Inosuke Koyano et al.: "State-selected charge-transfer and rearrangement reactions in four- atomic ion-molecule systems." Faraday Discussions of the Chemical Society. 84. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shin Arai et al.: "Lyman <alpha>, Lyman <alpha> coincidence detection inthe photodissociation of doubly excited molecular hydrogen into two H(2P) atoms." Journal of Chemical Physics. 88. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kenichiro Tanaka: Science Forum. Application techniques of synchrotron radiation. (Japanese), (1988)

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

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Published: 1989-03-30  

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