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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Stroboscopic Picosecond Pulse Radiolysis Using Near-Ultraviolet-Enhanced Femtosecond Continuum Generated by CaF_2
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Stroboscopic Picosecond Pulse Radiolysis Using Near-Ultraviolet-Enhanced Femtosecond Continuum Generated by CaF_2

机译:CaF_2产生的近紫外飞秒连续波频闪皮秒脉冲辐解

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摘要

For investigations of ultrafast reactions induced by radiation in the short-wavelength region, a near-ultraviolet-enhanced continuum ranging from ca. 390 to 600 nm was generated by focusing the second-harmonic generation (400 nm) of a femtosecond Ti:sapphire laser into a CaF_2 plate and applied to stroboscopic picosecond pulse radiolysis. By utilizing a double-pulse detection scheme, the fluctuation between the signal and reference pulses was improved to 2-12% of the standard deviation. The capability of the system in the wavelength region from 400 to 900 nm is demonstrated by measuring transient photoabsorption spectra in water and in tetrahydrofuran solution of biphenyl, where these spectra are attributed to hydrated electrons and the overlap between biphenyl radical anions and the solvated electrons of tetrahydrofuran, respectively.
机译:为了研究由短波辐射引起的超快速反应,近紫外增强的连续谱范围约为。通过将飞秒Ti:蓝宝石激光的第二谐波产生(400 nm)聚焦到CaF_2平板中,产生390至600 nm,并应用于频闪皮秒皮秒脉冲辐射分解。通过使用双脉冲检测方案,信号脉冲和参考脉冲之间的波动被提高到标准偏差的2-12%。通过测量联苯在水和四氢呋喃溶液中的瞬态光吸收光谱,可以证明该系统在400至900 nm波长范围内的能力,这些光谱归因于水合电子以及联苯阴离子与溶剂的电子之间的重叠。分别为四氢呋喃。

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