首页> 外文期刊>The Journal of Chemical Physics >Real-time detection of S(D-1(2)) photofragments produced from the B-1(2)((1)Sigma(+)(u)) state of CS2 by vacuum ultraviolet photoelectron imaging using 133 nm probe pulses
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Real-time detection of S(D-1(2)) photofragments produced from the B-1(2)((1)Sigma(+)(u)) state of CS2 by vacuum ultraviolet photoelectron imaging using 133 nm probe pulses

机译:通过使用133nm探针脉冲的真空紫外光电元件成像,从B-1(2)((1)Σ(+)(+)(+)(+)(+)(+)(+)(+)(+)(+)(+)(+))状态的实时检测。

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摘要

Ultrafast photodissociation dynamics from the B-1(2)((1)Sigma(+)(u)) state of CS2 are studied by time-resolved photoelectron imaging using the fourth (4 omega, 198 nm) and sixth (6 omega, 133 nm) harmonics of a femtosecond Ti: sapphire laser. The B-1(2) state of CS2 was prepared with the 4 ! pulses, and subsequent dynamics were probed using the 6 omega vacuum ultraviolet (VUV) pulses. The VUV pulses enabled real-time detection of S(D-1(2)) photofragments, produced via CS2 *(B-1(2)((1)Sigma(+)(u))) -> CS(X-1 Sigma(+)) + S(D-1(2)). The photoionization signal of dissociating CS2*(B-1(2)((1)Sigma(+)(u))) molecules starts to decrease at about 100 fs, while the S(D-1(2)) fragments appear with a finite (ca. 400 fs) delay time after the pump pulse. Also discussed is the configuration interaction of the B-1(2)((1)Sigma(+)(u)) state based on relative photoionization cross-sections to different cationic states. Published by AIP Publishing.
机译:来自B-1(2)((1)Σ(+)(+)(+)(u))CS2状态的超快光电解放动力学通过时间分辨的光电子成像使用第四(4 omega,198nm)和第六(6个Omega, 一台飞秒TI的谐波:蓝宝石激光器。 用4制备CS2的B-1(2)态! 使用6ω真空紫外(VUV)脉冲探测脉冲和随后的动态。 通过CS2 *(B-1(2)((1)Σ(+)(u))) - > CS(X-)产生的Vuv脉冲能够实时检测S(D-1(2))的光折叠式的光折叠纸屑。((1)(1)((1))) - > CS(X- 1 sigma(+))+ s(D-1(2))。 解离CS2 *(B-1(2)((1)σ(+)(+)(u))分子的光偶化信号在约100fs时开始减少,而S(D-1(2))片段出现 泵脉冲后有限(CA.400 FS)延迟时间。 还讨论的是基于相对点击横截面到不同阳离子状态的B-1(2)((1)Σ(+)(+)(+)(u))的配置相互作用。 通过AIP发布发布。

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