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首页> 外文期刊>Nuclear Instruments & Methods in Physics Research. B, Beam Interactions with Materials and Atoms >Determination of the chemical properties of residues retained in individual cloud droplets by XRF microprobe at SPring-8
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Determination of the chemical properties of residues retained in individual cloud droplets by XRF microprobe at SPring-8

机译：在SPring-8处通过XRF显微探针测定单个云滴中残留的残留物的化学性质

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摘要

To determine the chemical properties of residue retained in individual cloud droplets is primarily important for the understanding of rainout mechanism and aerosol modification in droplet. The sampling of individual cloud droplets were carried out on the summit of Mt. Taiko located in Tango peninsula, Kyoto prefecture, during Asian dust storm event in March of 2002. XRF microprobe system equipped at SPring-8, BL-37XU was applied to the subsequent quantification analysis of ultra trace elements in residues of individual cloud droplets. It was possible to form the replicas of separated individual cloud droplets on the thin collodion film. The two dimensional XRF maps for the residues in individual cloud droplets were clearly drawn by scanning of micro-beam. Also, XRF spectra of trace elements in residues were well resolved. From the XRF spectra for individual residues, the chemical mixed state of residues could be assumed. The chemical forms of Fe (Fe~(+++)) and Zn (Zn~+) could be clearly characterized by their K-edge micro-XANES spectra. By comparison of Z/Si mass ratios of residues in cloud droplets and those of the original sands collected in desert areas in China, the aging of ambient dust particles and their in cloud modification were indirectly assumed.
机译：确定单个云小滴中残留的残留物的化学性质对于理解小滴中的降雨机理和气溶胶改性至关重要。单个云滴的采样是在山顶进行的。 Taiko位于2002年3月的亚洲沙尘暴事件期间位于京都府丹后半岛。配备SPring-8，BL-37XU的XRF微型探针系统用于随后的单个云滴残留物中超痕量元素的定量分析。可以在薄胶棉薄膜上形成分离的单个云滴的复制品。通过扫描微束清楚地绘制了单个云滴中残留物的二维XRF图。同样，残留物中痕量元素的XRF光谱也得到了很好的解析。根据单个残基的XRF光谱，可以假定残基的化学混合状态。 Fe（Fe〜（+++））和Zn（Zn〜+）的化学形式可以通过其K边缘微XANES光谱清楚地表征。通过比较中国沙漠地区云滴与原始沙粒中Z / Si质量比，间接假设了环境尘埃颗粒的老化及其在云团改造中的作用。

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