论文标题
一个低温冰设置，以模拟星际冰中的碳原子反应
A cryogenic ice setup to simulate carbon atom reactions in interstellar ices
论文作者
论文摘要
讨论了定制的碳原子束源的设计，实现和性能，以研究分子云中星际冰中的固态反应路线。 The source is integrated into an existing ultrahigh vacuum setup, SURFace REaction SImulation DEvice (SURFRESIDE$^{2}$), which extends this double atom (H/D, O, and N) beamline apparatus with a third atom (C) beamline to a unique system that is fully suited to explore complex organic molecule solid-state formation under representative interstellar cloud conditions.讨论了该系统的参数空间，其中包括撞击冰样的碳原子的通量，温度以及温度对冰反应的潜在影响。将光束尺寸限制在样本量的范围内，旨在减少设置内部的碳污染。通过示例实验C + $^{18} $ o $ _2 $对C-ATOM光束的性能进行定量研究，并得到计算中衍生的激活屏障的支持。讨论了该来源研究星际复合物有机分子通过C-ATOM反应的固态形成的潜力。
The design, implementation, and performance of a customized carbon atom beam source for the purpose of investigating solid-state reaction routes in interstellar ices in molecular clouds are discussed. The source is integrated into an existing ultrahigh vacuum setup, SURFace REaction SImulation DEvice (SURFRESIDE$^{2}$), which extends this double atom (H/D, O, and N) beamline apparatus with a third atom (C) beamline to a unique system that is fully suited to explore complex organic molecule solid-state formation under representative interstellar cloud conditions. The parameter space for this system is discussed, which includes the flux of the carbon atoms hitting the ice sample, their temperature, and the potential impact of temperature on ice reactions. Much effort has been put into constraining the beam size to within the limits of the sample size with the aim to reduce carbon pollution inside the setup. How the C-atom beam performs is quantitatively studied through the example experiment, C + $^{18}$O$_2$, and supported by computationally-derived activation barriers. The potential for this source to study the solid-state formation of interstellar complex organic molecules through C-atom reactions is discussed.
