UV-induced diamond formation in interstellar clouds

在实验室实验的基础上，发现了星际云和碳质玄武岩母体中金刚石新的形成途径。结果表明，金刚石前驱体的成核作为一个结果，紫外光分解的星际冰混合物在分子云中，并与进一步的紫外线照射的扩散云。目前的研究支持星际云中存在钻石，并表明钻石在太空中无处不在。此外，我们还对分子云中形成的有机物质进行了水蚀变和随后的热变质作用的实验，并在碳质辉长岩的母体中发现了由这一过程形成的金刚石。这些新的形成途径很好地解释了金刚石和行星际尘埃中纳米金刚石的各种特征。

New formation routes of diamond in interstellar clouds and parent bodies of carbonaceous chondrites are found based on laboratory experiments. It is shown that diamond precursor nucleated as a result of UV photolysis of interstellar ice mixtures in molecular clouds, and grew with further UV irradiation in diffuse clouds. The present study supports the occurrence of diamonds in interstellar clouds, and suggests that diamond is ubiquitous in space. Furthermore, we performed experiments on the aqueous alteration and the subsequent thermal metamorphism of organic materials formed in molecular cloud, and found that diamonds formed by this process in the parent bodies of carbonaceous chondrites. The various characteristics of nano-diamonds in chondrites and interplanetary dusts are well explained by these new formation routes.