碳原子与氢分子的超低温反应
Ultra-Low-Temperature Reactions of Carbon Atoms with Hydrogen Molecules
摘要：
在$T$ = 0.37 K的液氦液滴中研究了碳原子与氢的反应。应用量热技术监测反应中释放的能量。探测到了单个碳原子和单个氢分子之间的无势垒反应。氢原子团簇与碳原子之间的反应已被高分辨质谱研究。观察到C型$_m$ H $_n^+$的烃阳离子的形成，其中$m$ = 1-4和$n$ = 1-15。随着二氢浓度的增加，质谱显示出归属于CH $_5^+$阳离子的主要“魔术”峰。这种阳离子的简单形成途径和高稳定性表明它在星际介质中的丰度很高。
英文摘要：
The reactions of carbon atoms with dihydrogen have been investigated in liquid helium droplets at $T$ = 0.37 K. A calorimetric technique was applied to monitor the energy released in the reaction. The barrierless reaction between a single carbon atom and a single dihydrogen molecule was detected. Reactions between dihydrogen clusters and carbon atoms have been studied by high-resolution mass spectrometry. The formation of hydrocarbon cations of the type C$_m$H$_n^+$, with $m$ = 1-4 and $n$ = 1-15 was observed. With enhanced concentration of dihydrogen, the mass spectra demonstrated the main "magic" peak assigned to the CH$_5^+$ cation. A simple formation pathway and the high stability of this cation suggest its high abundance in the interstellar medium.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
