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Measurement of mean residence time of physisorbed hydrogen and deuterium

Research Project

Project/Area Number 17K05062
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Thin film/Surface and interfacial physical properties
Research InstitutionGakushuin University

Principal Investigator

Arakawa Ichiro  学習院大学, 理学部, 教授 (30125976)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords物理吸着 / 吸着等温線 / 平均滞在時間 / 極高真空 / クライオポンプ / 赤外吸収分光 / クライオポンピング / 真空
Outline of Final Research Achievements

Electron stimulated desorption technique was applied to probe the density of deuterium molecule (D_2) physisorbed on a cold copper surface. The adsorption isotherm of D_2 on a copper surface was measured in the equilibrium pressure between 1 nPa and 0.01 mPa, at the surface temperatures between 4 K and 8 K, and at the coverages between 0.001 and 1.
The mean residence time of D_2 on copper was obtained from the observation of the time development of the surface density in a transitional state approaching equilibrium. The adsorption energy and the condensation coefficient were also deduced. The mean residence time depends on the coverage and is strongly affected by condensation phenomena of physisorbed film.

Academic Significance and Societal Importance of the Research Achievements

学術的には、吸着現象の理解のための基本的なパラメータである平均滞在時間を直接測定する手法を確立したことである。社会的(生産技術的)には、クライオポンプで真空排気を行うときに必要とされる水素分子の吸着の素過程の理解を、極高真空領域にまで拡張したことが重要である。これまで超高真空領域で観察されていた、排気特性の温度依存性の異常が極高真空領域においても観察されることを実験的に明らかにした。これは、クライオポンプの動作(表面)温度を議論するときの基礎データとして重要である。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (12 results)

All 2020 2019 2018 2017 Other

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 5 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Terahertz and mid-infrared spectroscopy of matrix-isolated clusters and matrix-sublimation ice of D2O2020

    • Author(s)
      K. Yamakawa, H. Nasu, N. Suzuki, G. Shimizu, and I. Arakawa
    • Journal Title

      J. Chem. Phys.

      Volume: 152 Issue: 17 Pages: 174310-174310

    • DOI

      10.1063/5.0005766

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spectroscopic determination of interconversion rates among three nuclear spin isomers of methane in crystalline II2019

    • Author(s)
      T. Sugimoto, H. Nasu, I. Arakawa,and K. Yamakawa
    • Journal Title

      J. Chem. Phys.

      Volume: 150 Issue: 18 Pages: 184302-184302

    • DOI

      10.1063/1.5091070

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of Physisorption-Study Apparatus in Extremely High Vacuum Region2018

    • Author(s)
      KAWAHARA Kohta、KATO Yuki、KUBOTA Kosuke、YAMAKAWA Koichiro、ARAKAWA Ichiro
    • Journal Title

      Vacuum and Surface Science

      Volume: 61 Issue: 8 Pages: 533-538

    • DOI

      10.1380/vss.61.533

    • NAID

      130007432110

    • ISSN
      2433-5835, 2433-5843
    • Year and Date
      2018-08-10
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Nuclear spin conversion of H2O in a Kr matrix2019

    • Author(s)
      K. Yamaguchi, K. Yamakawa, and I. Arakawa
    • Organizer
      10th International Conference on Advanced Vibrational Specgtroscopy
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of the adsorption isotherms and the mean residence time of D2 physisorbed on a cold copper surface2019

    • Author(s)
      Y. Inana, K. Kawahara, K. Yamakawa, I. Arakawa
    • Organizer
      21st International Vacuum Congress
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of the adsorption isotherms and the mean residennce time of deutrium physisorbed on a cold copper surface2019

    • Author(s)
      Y. Inana, K. Kawahara, T. Ohtaki, A. Hirai, K. Yamakawa, and I. Arakawa
    • Organizer
      21th International Vacuum Congress
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Measurement of the adsorption isotherms and the mean residennce time of hydrogen and deutrium physisorbed on a cold copper surface2018

    • Author(s)
      K. Kawahara, Y. Inana, T. Ohtaki, A. Hirai, K. Yamakawa, and I. Arakawa
    • Organizer
      15th European Vacuum Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 低温銅表面に物理吸着した重水素の吸着等温線と平均滞在時間2018

    • Author(s)
      稲名洋平,河原幸太,大滝寿一,平井亮,山川紘一郎,荒川一郎
    • Organizer
      2018年日本表面真空学会学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Measurement of the adsorption isotherms and the mean residence time of hydrogen and deutrium physisorbed on a cold copper surface2018

    • Author(s)
      K. Kawahara, K. Oyamada, R. Akashi, K. Yamakawa, I. Arakawa
    • Organizer
      15th European Vacuum Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 低温銅表面に物理吸着した水素の吸着等温線と平均滞在時間の測定2017

    • Author(s)
      河原幸太,加藤勇樹, 山﨑勇澄, 山川紘一郎, 荒川一郎
    • Organizer
      真空・表面科学合同講演会
    • Related Report
      2017 Research-status Report
  • [Book] 真空科学ハンドブック2018

    • Author(s)
      荒川一郎(編・著),他
    • Total Pages
      578
    • Publisher
      コロナ社
    • ISBN
      9784339009088
    • Related Report
      2017 Research-status Report
  • [Remarks] Publication List of Arakawa Laboratory

    • URL

      http://www-cc.gakushuin.ac.jp/~e840050/publications/index.html

    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

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