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固定散射角θ,采用连续波长的X射线对3类纯液体物质(伯醇、苯同系物与氯代甲烷)进行了能量色散X射线散射实验,得到了上述纯液体物质的能量色散X射线散射图谱。结果表明,每种液体物质的能量色散X射线散射图谱的峰形与峰位置彼此不同。伯醇随着碳链长度的增加,散射峰宽变窄,主峰位置向小的散射参数动量转移(q)值方向移动。苯同系物的散射曲线的峰形彼此不同,且主峰峰位的q值从苯、甲苯、邻二甲苯依次降低。氯代甲烷散射曲线的峰形随着取代氯原子数目不同而不同。液体物质的密度影响散射光谱的峰位置。液体物质散射曲线的差异与液体物质的组成、化学结构以及密度紧密相关。液体物质能量色散X射线散射图谱所揭示的峰形与峰位等特征信息,预示着能量色散X射线散射方法有可能作为非破坏性、非接触式检测与识别隐藏液体物质的有效手段。
Fixed scattering angle θ, energy dispersive X-ray scattering experiments on three types of pure liquid substances (primary alcohols, benzene homologues and methyl chloride) were carried out with continuous wavelength X-ray. The energy dispersive X-ray scattering Map. The results show that the peak shapes and the peak positions of the energy dispersive X-ray scattering spectrum of each liquid material are different from each other. As the length of the carbon chain increases, the peak width of the primary alcohol narrows, and the position of the main peak moves toward the small scattering parameter q (q). The peak shapes of the scattering curves of the benzene homologs are different from each other, and the q value of the peak of the main peak is successively decreased from benzene, toluene and o-xylene. The peak shape of the methyl chloride scattering curve varies depending on the number of substituted chlorine atoms. The density of the liquid material affects the peak position of the scattering spectrum. Differences in liquid material scattering curves are closely related to the composition, chemical structure, and density of the liquid material. The characteristic information such as the peak shape and the peak position revealed by the energy dispersive X-ray scattering of the liquid material indicates that the energy dispersive X-ray scattering method may be used as an effective non-destructive and non-contact detection and identification of hidden liquid substances.