Primary Decomposition Processes of Liquid Alkanes Studied by Picosecond Pulse Radiolysis

皮秒脉冲辐解研究液体烷烃的初级分解过程

• 批准号: 07680532
• 负责人: YOSHIDA Yoichi
• 金额: $ 1.22万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07680532/
• 关键词: Primary Processes; Radiation Chemistry; Picosecond Pulse Radiolysis; Alkane; Geminate Ion Recombination; Electron; Cation Radical; Smoluchowski equation

Primary decomposition processes in liquid alkanes were studied by the nanosecond and picosecond pulse radiolysis. Following results were concluded.1) A New picosecond pulse radiolysis for the absorption spectroscopy was developed. A picosecond electron pulse from the linear accelarator was used as the irradiation source, and femtosecond laser was used as the analyzing light. Both electron and laser pulse were synchronized by using the same radio frequency. The observable wavelength was very wide covered from 250 nm to 2000 nm.2) In order to elucidate the primary decompostion processes of liquid alkanes, the dynamics of cation radicals and electron produced by high energy radiation, so called geminate ion recombination, was investigated. Especially, the reactivates of the cation radicals and the electrons with solutes which depressed the decomposition were tested. The dynamics was analyzed by the theoretical Smoluchowski equation based on the diffusion theory. The rate constants were determined.3) The whole mechanism of the decomposition processes was studied based on the experimental results obtained in the nanosecond and picosecond pulse radiolysis. It was concluded that the cation radicals and electrons playd an important role in the primary processes.

通过纳秒和皮秒脉冲辐射分解研究了液态烷烃的初级分解过程。得出以下结论：1)开发了一种新的皮秒脉冲辐解吸收光谱方法。来自线性加速器的皮秒电子脉冲用作照射源，飞秒激光用作分析光。电子和激光脉冲通过使用相同的射频来同步。观测波长范围很广，从250 nm到2000 nm。2)为了阐明液态烷烃的初级分解过程，研究了高能辐射产生的阳离子自由基和电子的动力学，即双离子复合。特别是，测试了抑制分解的阳离子自由基和电子与溶质的再活化。通过基于扩散理论的理论Smoluchowski 方程对动力学进行了分析。确定了速率常数。3)根据纳秒和皮秒脉冲辐解实验结果研究了分解过程的整体机理。结论是阳离子自由基和电子在初级过程中发挥着重要作用。

项目成果

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S.Nagahara、Y.Yamashita、T.Taguchi、T.Kozawa 和 S.Takawa：“X 射线化学放大正性光刻胶中诱导的瞬态物质：曝光后延迟效应”光聚合物科学与技术杂志。

S. Nagahara, Y. Yamashita, T. Taguchi, T. Kozawa and S. Tagawa.: "Transient Species Induced in X-ray Chemically Amplified Positive Resists: Post-exposure Delay Effect." Journal of Photopolymer Science and Techonology,. 9. 619-626 (1996)

S. Nagahara、Y. Yamashita、T. Taguchi、T. Kozawa 和 S. Takawa.：“X 射线化学放大正性抗蚀剂中诱导的瞬态物质：曝光后延迟效应”。

H. Shibata, S. Seki, S. Tagawa, Y. Yoshida and K. Ishigure: "Time-dependent emission spectra from polysilane thin film by MeV ion beams" Nuclear Instruments and Method. B105. 42-45 (1995)

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吉田洋一：“双子重组过程和初始空间分布的研究”放射化学60。38-40（1995）。

H. Koizumi, T. Ichikawa, H. Yoshida, H. Shibata, S. tagawa and Y. Yoshida: "Radical Formation in the Radiolysis of Solid Alanine by Protons and Helium Ions" Nuclear Instruments and Method. B117. 269-274 (1996)

H. Koizumi、T. Ichikawa、H. Yoshida、H. Shibata、S. takawa 和 Y. Yoshida：“质子和氦离子辐射分解固体丙氨酸中的自由基形成”核仪器和方法。