Chen, LeiWang, EnliangShan, XuShen, ZhenjieZhao, XiChen, Xiangjun2023-12-072023-12-072021-09-10https://hdl.handle.net/2097/44090We report on an investigation on the fragmentation dynamics of CF4q+ (q=2,3) induced by 1-keV electron collisions utilizing an ion momentum imaging spectrometer. From the time-of-flight correlation maps five dominating dissociation channels of CF42+ as well as one three-body fragmentation channel of CF43+ are identified. The kinetic energy release (KER) distributions for these channels are obtained and compared with the data available in the literature. The Dalitz-like momentum diagram and the Newton diagram are employed to analyze the breakup mechanism in the three-body fragmentation channel. We found that, for CF42+ dissociation into F++CF2++F, F++CF++2F, and F++F++CF2, the concerted breakup is the dominating process. Channel C++F++3F is dominated by the initial charge separation, i.e., CF42+→F++CF++2F→C++F++3F. With the help of the native frame method, we assigned one sequential pathway and two concerted pathways for channel CF43+→F++F++CF2+. The branching ratios of these pathways are determined. The momentum correlation of the fragments and the deduced KER distribution indicate that different excited states of CF43+ with different geometries are responsible for these three pathways. The Coulomb explosion model simulation shows that most of the events in this channel are produced by CF43+ ions that have deformed geometries from the neutral CF4 molecule.© American Physical Society (APS). This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).Text