Shen Zhenjie, Wang Enliang, Gong Maomao, Shan Xu, Chen Xiangjun
Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
J Chem Phys. 2016 Dec 21;145(23):234303. doi: 10.1063/1.4972064.
The fragmentation dynamics of OCS (q = 2, 3, 4) induced by electron collision at an impact energy of 500 eV is studied. By using the momentum imaging technique, the three dimensional momentum vectors of all the fragments are obtained, which enables us to analyse both the kinetic energy release and the momentum correlations for a certain fragmentation channel. Up to fifteen dissociation channels are analyzed including six, five, and four channels for two-body, and incomplete and complete three-body Coulomb fragmentations. For three-body dissociation, the fragmentation mechanisms are investigated with the help of Dalitz plot and Newton diagram. It is found that the sequential fragmentation involves in OCS→O+C+S with S emitted first and in OCS→O+C+S with O-C and C-S bonds breaking first. The remaining channels, however, always dissociate through a concerted mechanism. The relative intensities of the channels are also presented in this work.
研究了在500 eV碰撞能量下电子碰撞诱导的OCS（q = 2, 3, 4）的碎裂动力学。通过使用动量成像技术，获得了所有碎片的三维动量矢量，这使我们能够分析特定碎裂通道的动能释放和动量相关性。分析了多达十五个解离通道，包括两体、不完全和完全三体库仑碎裂的六个、五个和四个通道。对于三体解离，借助达利兹图和牛顿图研究了碎裂机制。发现顺序碎裂涉及OCS→O + C + S，其中S先发射，以及OCS→O + C + S，其中O - C和C - S键先断裂。然而，其余通道总是通过协同机制解离。这项工作还给出了通道的相对强度。
