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• W3201631285 abstract "We report on an investigation on the fragmentation dynamics of $mathrm{C}{{mathrm{F}}_{4}}^{q+}$ $(q=2,3)$ induced by 1-keV electron collisions utilizing an ion momentum imaging spectrometer. From the time-of-flight correlation maps five dominating dissociation channels of $mathrm{C}{{mathrm{F}}_{4}}^{2+}$ as well as one three-body fragmentation channel of $mathrm{C}{{mathrm{F}}_{4}}^{3+}$ 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 $mathrm{C}{{mathrm{F}}_{4}}^{2+}$ dissociation into ${mathrm{F}}^{+}+mathrm{C}{{mathrm{F}}_{2}}^{+}+mathrm{F}$, ${mathrm{F}}^{+}+mathrm{C}{mathrm{F}}^{+}+2mathrm{F}$, and ${mathrm{F}}^{+}+{mathrm{F}}^{+}+{mathrm{CF}}_{2}$, the concerted breakup is the dominating process. Channel ${mathrm{C}}^{+}+{mathrm{F}}^{+}+3mathrm{F}$ is dominated by the initial charge separation, i.e., $mathrm{C}{{mathrm{F}}_{4}}^{2+}ensuremath{rightarrow}{mathrm{F}}^{+}+mathrm{C}{mathrm{F}}^{+}+2mathrm{F}ensuremath{rightarrow}{mathrm{C}}^{+}+{mathrm{F}}^{+}+3mathrm{F}$. With the help of the native frame method, we assigned one sequential pathway and two concerted pathways for channel $mathrm{C}{{mathrm{F}}_{4}}^{3+}ensuremath{rightarrow}{mathrm{F}}^{+}+{mathrm{F}}^{+}+mathrm{C}{{mathrm{F}}_{2}}^{+}$. 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 $mathrm{C}{{mathrm{F}}_{4}}^{3+}$ 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 $mathrm{C}{{mathrm{F}}_{4}}^{3+}$ ions that have deformed geometries from the neutral ${mathrm{CF}}_{4}$ molecule." @default.
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• W3201631285 date "2021-09-10" @default.
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• W3201631285 title "Fragmentation of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi mathvariant=normal>C</mml:mi><mml:msup><mml:mrow><mml:msub><mml:mi mathvariant=normal>F</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow><mml:mrow><mml:mi>q</mml:mi><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mo>(</mml:mo><mml:mi>q</mml:mi><mml:mo>=</mml:mo><mml:mn>2</mml:mn><mml:mo>,</mml:mo><mml:mn>3</mml:mn><…" @default.
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• W3201631285 doi "https://doi.org/10.1103/physreva.104.032814" @default.
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