Modelling absorption of electromagnetic radiation by carbon-based constituents of the interstellar medium

模拟星际介质碳基成分对电磁辐射的吸收

• 批准号: EP/F016603/1
• 负责人: Roger Smith
• 金额: $ 9.18万
• 依托单位: Loughborough University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FF016603%2F1
• 关键词: Modelling; absorption; electromagnetic; radiation; carbon

This proposal will investigate the hypothesis that carbon in an amorphous aggregate state forms particles of interstellar matter. This will be achieved by using the well-known property that amorphous carbon lacks long range order. As a result of this property, the process of absorption of electromagnetic radiation by amorphous structures appears locally and similar to that for molecules. As a result the electronic energy spectra of small molecular clusters of carbon in different forms will be investigated by performing ab initio calculations. A primary purpose of these calculations will be to understand the propensity of these small clusters for absorption of electromagnetic radiation.The results from the small carbon clusters will be used to parameterise an empirical many body potential function which will be used to examine the structure of amorphous carbon of different densities on a much larger scale than can be achieved using ab initio calculations alone.

这个提议将研究假设，碳在无定形的聚集状态形成粒子的星际物质。这将通过利用众所周知的非晶碳缺乏长程有序的特性来实现。由于这一性质，非晶结构对电磁辐射的吸收过程在局部出现，与分子的吸收过程相似。因此，不同形式的碳小分子簇的电子能谱将通过从头计算进行研究。这些计算的一个主要目的是了解这些小簇吸收电磁辐射的倾向。来自小碳团簇的结果将用于参数化经验多体势函数，该函数将用于在比单独使用从头计算更大的尺度上检查不同密度的无定形碳的结构。

项目成果

Structure-induced negatively skewed X-ray diffraction pattern of carbon onions

碳洋葱的结构诱导负偏X射线衍射图

• DOI: 10.1063/1.4824286
• 发表时间: 2013
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: Siklitskaya A

Variable step radial ordering in carbon onions

碳洋葱中的可变步长径向排序

• DOI: 10.1016/j.diamond.2012.11.012
• 发表时间: 2013
• 期刊: Diamond and Related Materials
• 影响因子: 4.1
• 作者: Siklitskaya A

Contribution of carbon Nanoclusters to galactical Optical Extinction curves

碳纳米团簇对银河消光曲线的贡献

• 发表时间: 2008
• 作者: N/a Smith