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Threshold Photoelectron-photoion Coincidence Imaging of Dissociation Dynamic of NO+ at c3∏(v′=0) State
Jin-da Sun1, Xiao-bin Shan1, Fu-yi Liu1, Liu-si Sheng*1, Xiao-feng Tang2, Ming-li Niu2, Lei Song2, Xiao-guo Zhou2, Shi-lin Liu2
1.School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;2.Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
Abstract:
The photodissociation of NO+ at c3∏(v′=0) state is studied by threshold photoelectron-photoion coincidence imaging method. By some assumptions, the relations between velocity in center of mass (CM) coordinates and most probable center of mass (MPCM) coordinates,time of flight and displacement in the velocity map image of fragment ions are derived using vector addition of velocity and displacement on the condition of perpendicular molecular beam. Using these relations the velocity in CM coordinates, the velocity and angular distri-bution of N+ fragment ions in MPCM coordinates are obtained and discussed, respectively.
Key words:  Threshold photoelectron-photoion coincidence imaging, Velocity map imag-ing, Nitric oxide, Kinetic energy released distribution, Angular distribution
FundProject:
阈值光电子-光离子符合成像研究NO+c3∏(v′=0)态解离动力学
孙金大1, 单晓斌1, 刘付轶1, 盛六四*1, 唐小锋2, 牛铭理2, 宋磊2, 周晓国2, 刘世林2
1.中国科学技术大学国家同步辐射实验室,核科学技术学院,合肥230029;2.中国科学技术大学合肥微尺度物质科学国家实验室,化学物理系,合肥230026
摘要:
用阈值光电子-光离子符合成像方法研究了处于c3∏(v′=0)态的NO+的光解离. 在使用垂直分子束的情况下,近似矢量加法规则推导了碎片离子在质心坐标系和最可几质心坐标系中的速度,飞行时间和在速度图像中的位移之间关系. 得到并讨论了N+碎片离子在质心坐标系中速度及在最可几质心坐标系中的速度和角度分布.
关键词:  阈值光电子-光离子符合成像,速度成像,一氧化氮,释放动能,角度分布
DOI:10.1088/1674-0068/23/05/509-512
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