Determining excitation temperature of fragmented C60via momentum distributions of fragments
Document Type
Article
Publication Date
2-28-2011
Abstract
Hot C60 molecules under nanosecond laser excitation decay by a variety of fragmentation channels. An experimental search has been made to determine the excitation temperature of fragmented C60via analyzing the momentum distributions of the prompt ionic fragments Cn+ (n ≤ 58). It was found that all the C60 precursors appearing as these ionic fragments have almost the same temperature and the temperature shows little variation with the laser fluences in our limited range. The results provide a clear evidence that a first-order phase transition in the fragmented C60 is occurring at this temperature. The value of phase transition temperature is found to be about 6050 ± 250 K, which is in a good agreement with the most recent estimations based on the molecular dynamics simulation. This approach offers an experimental opportunity for studying the fragmentation thermodynamics of more complex polyatomic molecules under excitation temperature determined conditions. © the Owner Societies 2011.
Publication Source (Journal or Book title)
Physical Chemistry Chemical Physics
First Page
3328
Last Page
3333
Recommended Citation
Qian, D., Ma, X., Chen, Z., Zhang, D., Zhang, S., Li, B., Zhu, X., Liu, H., & Wen, W. (2011). Determining excitation temperature of fragmented C60via momentum distributions of fragments. Physical Chemistry Chemical Physics, 13 (8), 3328-3333. https://doi.org/10.1039/c0cp00773k