PULSE--RADIOLYSIS SYSTEM FOR THE OBSERVATION OF SHORT-LIVED TRANSIENTS.
PULSE--RADIOLYSIS SYSTEM FOR THE OBSERVATION OF SHORT-LIVED TRANSIENTS.
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脉冲——用于观察短暂瞬态的放射分解系统。
DOI：
10.1021/j100857a010
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发表时间：
1968
期刊：
影响因子：
--
通讯作者：
J. Hunt
中科院分区：
文献类型：
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作者：
M. Bronskill;J. Hunt
辐射化学领域中的几个有趣的问题发生在电离粒子通过后 0.01 到 1 纳秒的时间间隔内。现有的脉冲放射分解系统无法研究这些问题，因为它们的时间分辨率仅限于约 1 纳秒。本文描述了一种新技术，理论上能够观察短暂至 0.02 纳秒的瞬态吸收信号。该技术将利用来自多伦多线性加速器的 30 MeV 电子束产生的切伦科夫光来检测电子束精细结构脉冲（0.01 纳秒宽）产生的瞬态物质的吸收。通过改变切伦科夫闪光和精细结构电子脉冲之间的相位差来产生频闪效应。通过这种技术，可以使用传统的慢速检测系统来实现0的时间分辨率。 02 纳秒。实验观察表明，尽管尚未观察到短暂的瞬变，但这种检测系统是完全实用的。
Several interesting problems in the field of radiation chemistry occur in the time interval from 0.01 to 1 nsec following the passage of an ionizing particle. Existing pulse-radiolysis systems are unable to investigate these problems because their time resolution is limited to about 1 nsec. In this paper a new technique is described which is theoretically capable of observing transient absorption signals as short-lived as 0.02 nsec. This technique will use the Cerenkov light produced by the 30-MeV electron beam from the Toronto linear ac-celerator to detect the absorption of transient species produced by the fine-structure pulses (0.01 nsec wide) of the electron beam. A stroboscopic effect is created by varying the phase difference between the Cerenkov light flashes and the fine-structure electron pulses. With this technique a conventional slow detection system can be used to achieve a time resolution of0. 02 nsec. Experimental observations indicate that such a detec-tion system is completely practical, although no short-lived transients have yet been observed.