Fluorescence from photoexcitation of C2H2 at 50–106 nm
Fluorescence from photoexcitation of C2H2 at 50–106 nm
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C2H2 在 50–106 nm 处光激发产生的荧光
DOI：
10.1063/1.455810
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发表时间：
1989
影响因子：
4.4
通讯作者：
L. C. Lee
中科院分区：
文献类型：
--
作者：
J. Han;C. Ye;M. Suto;L. C. Lee
使用同步辐射作为光源，在 50-106 nm 区域测量 C2H2 的光吸收和荧光截面。在几个激发波长下观察到的荧光被分散，以识别被激发的荧光物质 C2H*、C*2 、CH*、H* 和可能的 C2H+*2 。讨论了 C2 H2 导致荧光物质形成的光解过程。在 92.3 和 95.5 nm 处观察到的 C2 (C-A) 发射是由与超激发态相关的分子消除过程产生的。还观察了 C2 H2 在 157.5 和 193 nm 处双光子激发的荧光光谱，并与等效激发能下的单光子激发荧光光谱进行了比较。
The photoabsorption and fluorescence cross sections of C2H2 were measured in the 50–106 nm region using synchrotron radiation as a light source. Fluorescence observed at several excitation wavelengths was dispersed to identify the fluorescing species that are excited C2H*, C*2 , CH*, H*, and possibly C2H+*2 . The photodissociation process of C2 H2 leading to the formation of fluorescing species is discussed. The C2 (C–A) emission observed at 92.3 and 95.5 nm is produced by the molecular elimination process associated with superexcited state(s). Fluorescence spectra from the two‐photon excitation of C2 H2 at 157.5 and 193 nm were also observed and compared with those of single‐photon excitation at the equivalent excitation energies.