Study of radiation induced ultra-fast charge transfer in condensed matter

2013 Fiscal Year Final Research Report

• Project/Area Number: 24710094
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Quantum beam science
• Research Institution: Osaka University
• Principal Investigator: KONDOH Takafumi 大阪大学, 産業科学研究所, 助教 (50336765)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: 量子ビーム産業応用 / 電子・エネルギー移動 / 高速反応の解析 / パルスラジオリシス / 吸収分光法

Research Abstract

Measurable wavelength of a femtosecond pulse radiolysis system was extended to ultraviolet from near-infrared region. Geminate ion recombination was researched in n-dodecane which is representative nonpolar liquids. As results, an indirect evidence of an excited radical cation which generated primary by ionization was found. By using an aromatic scavenger, it was revealed that the excited radical cation has high reactivity. Molar absorption coefficient and G-value of the radical cation was estimated as 13950M-1cm-1 and 2.5 respectively. And then, G-value of initial ionization yield in n-dodecane was disclosed as 4.5. Formation process of alkyl radicals was observed at 240 nm, and got formation time at 7 ps. It was found the possibility that the excited radical cation is involved in radiolysis of dodecane. It is very important knowledge for the quantum beam science and radiation chemistry.

Research Products

• [Journal Article] フェムト秒パルスラジオリシス (2014)
  • Author(s): 近藤孝文,楊金峰,菅晃一,神戸正雄,柴田裕実,吉田陽一
  • Journal Title: 電気学会論文誌C Volume: Vol.134.No.5 Pages: pp 664-669
  • DOI: 10.1541/ieejeiss.134.664
  • Peer Reviewed
• [Journal Article] Twin-peaks absorption spectra of excess electron in ionic liquids, Raluca Radiat (2014)
  • Author(s): Raluca M. Musat, Takafumi Kondoh, Yoichi Yoshida, Kenji Takahashi
  • Journal Title: Phys. Chem Volume: 100 Pages: 32-37
  • DOI: 10.1016/j.radphyschem.2014.03.013
  • Peer Reviewed
• [Journal Article] Femtosecond pulse radiolysis study of geminate ion recombination in biphenyl-dodecane solution (2013)
  • Author(s): T. Kondoh, J. Yang, K. Norizawa, K. Kan, T. Kozawa, A. Ogata, S. Tagawa, Y. Yoshida
  • Journal Title: Radiat. Phys. Chem Volume: 84 Pages: 30-34
  • DOI: 10.1016/j.radphyschem.2012.06.051
  • Peer Reviewed
• [Journal Article] Development of double-decker pulse radiolysis (2012)
  • Author(s): K. Kan, T. Kondoh, J. Yang, A. Ogata, K. Norizawa, Y. Yoshida
  • Journal Title: Rev. Sci. Instrum Volume: 83 Pages: 073302
  • DOI: 10.1063/1.4731652
  • Peer Reviewed
• [Journal Article] 極短パルス高周波電子銃 (2012)
  • Author(s): 楊金峰,菅晃一,近藤孝文,室岡義栄,成瀬延康,吉田陽一,谷村克己,浦川順二
  • Journal Title: J. Vacuum Society of Japan Volume: 55 Pages: 42-49
  • DOI: 10.3131/jvsj2.55.42
  • Peer Reviewed
• [Journal Article] フェムト秒時間分解MeV電子顕微鏡の開発 (2012)
  • Author(s): 楊金峰,成瀬延康,室岡義栄,菅晃一,近藤孝文,谷村克己,吉田陽一
  • Journal Title: 放射線化学 Volume: 94号 Pages: 3-12
  • URL: http://www.radiation-chemistry.org/kaishi/no94.html
  • Peer Reviewed
• [Presentation] フェムト秒パルスラジオリシスを用いたドデカンアルキルラジカルの研究 (2014)
  • Author(s): 近藤孝文、井河原大樹、樋川智洋、神戸正雄、菅晃一、楊金峰、法澤公寛、田川精一、吉田陽一
  • Organizer: 3D4-38、日本化学会第94春季年会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2014-03-29
• [Presentation] ドデカンの放射線分解初期過程におけるアルキルラジカルの時間挙動 (2014)
  • Author(s): 近藤孝文、井河原大樹、樋川智洋、法澤公寛、神戸正雄、菅晃一、楊金峰、柴田裕実、小林仁、小方厚、田川精一、吉田陽一
  • Organizer: D31、日本原子力学会「2014年春の年会」
  • Place of Presentation: 東京都市大学
  • Year and Date: 2014-03-27
• [Presentation] 高濃度溶液中ビフェニルの直接イオン化効果のフェムト秒パルスラジオリシスによる研究 (2013)
  • Author(s): 近藤孝文、井河原大樹、榎本智至、田川精一、楊金峰、法澤公寛、樋川智洋、菅晃一、吉田陽一
  • Organizer: 日本原子力学会2013春の年会
  • Place of Presentation: 近畿大学
  • Year and Date: 20130326-28
• [Presentation] Femtosecond pulse radiolysis study of dodecane radical cation (2013)
  • Author(s): T. Kondoh, J. Yang, K. Norizawa, K. Kan, H. Kobayashi, A. Ogata, S. Tagawa
  • Organizer: the 28th Miller Conference on Radiation Chemistry
  • Place of Presentation: Dead Sea, Israel
  • Year and Date: 20130314-19
• [Presentation] 紫外フェムト秒パルスラジオリシスの開発とドデカンアルキルラジカルの観測 (2013)
  • Author(s): 近藤孝文、室屋裕佐、井河原大樹、樋川智洋、法澤公寛、神戸正雄、菅晃一、楊金峰、柴田裕実、小林仁、小方厚、田川精一、吉田陽一
  • Organizer: 1O-10、第56回放射線化学討論会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-09-27
• [Presentation] Femtosecond Pulse Radiolysis for Radiation Chemistry (2012)
  • Author(s): T. Kondoh, J. Yang, K. Norizawa, K. Kan, T. Toigawa, H Kobayashi, A Ogata, S. Tagawa, Y. Yoshida
  • Organizer: 3rd World Class Institute Symposium (WCI-Symposium 2012)
  • Place of Presentation: KIST, Seoul, Korea
  • Year and Date: 20121114-16
  • Invited
• [Presentation] Geminate ion recombination and ultrafast charge transfer in n-dodecane studied by femtosecond pulse radiolysis (2012)
  • Author(s): T. Kondoh, J. Yang, K. Norizawa, K. Kan, T. Toigawa, H. Kobayashi, A. Ogata, S. Tagawa, Y. Yoshida
  • Organizer: 4th Asia Pacific Symposium on Radiation Chemistry (APSRC-2012)
  • Place of Presentation: Huangshan, China(oral)
  • Year and Date: 20121030-1103
• [Presentation] フェムト秒パルスラジオリシスによるドデカン中のジェミネートイオン再結合と超高速電荷移動過程の研究 (2012)
  • Author(s): 近藤孝文,楊金峰,法澤公寛,菅晃一,樋川智洋,井河原大樹,小林仁,小方厚,田川精一,吉田陽一
  • Organizer: 2O-02,第55回放射線化学討論会
  • Place of Presentation: モンタナリゾート岩沼
  • Year and Date: 20120926-28
• [Presentation] Geminate ion recombination and ultrafast charge transfer in n–dodecane studied by femtosecond pulse radiolysis (2012)
  • Author(s): T. Kondoh, J. Yang, K. Norizawa, K. Kan, T. Toigawa, H. Kobayashi, A. Ogata, S. Tagawa, Y. Yoshida
  • Organizer: The Radiation Chemistry Gordon Research Conference (GRC)
  • Place of Presentation: Andover, New Hampshire, USA(poster)
  • Year and Date: 20120729-0803
• [Presentation] Progress of the Equivalent Velocity Spectroscopy Method for Femtosecond Pulse Radiolysis by Pulse Rotation and Pulse Compression (2012)
  • Author(s): T. Kondoh, K. Kan, K. Norizawa, A. Ogata, S. Tagawa, J. Yang, Y. Yoshida, H. Kobayashi
  • Organizer: THPPR059, International Particle Accelerator Conference (IPAC'12)
  • Place of Presentation: New Orleans, USA(poster)
  • Year and Date: 20120520-25
• [Remarks]
  • URL: http://www.sanken.osaka-u.ac.jp/labs/bsn/yoshilab.htm