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摘要: 利用第一性原理分子动力学方法,对炸药降解产物CO在温度5 000 K、压力25 GPa条件下的化学过程进行了研究。计算得到的最终产物主要由C3O2、CO2和C2O2组成。通过对CO、C3O2、CO2和C2O2组成的混合物体系的振动性质进行分析,发现计算得到的红外光谱与一些理论和实验结果一致;体系的径向分布函数表明,最终产物具有高密度流体的特征;同时还分析了CO、C3O2和CO2的态密度。结果表明:CO在温度5 000 K、压力25 GPa 这一特定条件下的反应主要归因于高温高压下CO分子间的剧烈碰撞;在形成这些产物的过程中没有发现有明显的过渡态存在。Abstract: The chemical reaction of CO, being one of the main explosive denotation products, was investigated at 5 000 K and 25 GPa by ab initio molecular dynamics simulations. The final products are C3O2, CO2, and C2O2. The infrared spectroscopy of the system is agreement with many theories and experiments. Radial distribution function (RDF) of the system shows the characteristics of high density fluid. Density of states (DOS) of the products was also presented. By analyzing the mechanism of products of CO under the extreme condition of 5 000 K and 25 GPa, we found that the reaction of CO is mainly due to intermolecular collisions, and transition state is not found in the system.
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Key words:
- CO /
- infrared spectroscopy /
- radial distribution function /
- density of state /
- molecular dynamics
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