在ELI Beamlines进行样本表征的X射线光谱站
A Zymaková1, M Precek2, A Picchiotti2,3
1ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnicí 835, 25241, Dolní Břežany, Czech Republic. anna.zymakova@eli-beams.eu.
Scientific reports
|October 12, 2023
概括
开发了一个新的X射线发射光谱站,提高了液体和粉末样本的精度. 这一进步增强了X射线光谱在各种科学领域的应用.
科学领域:
- 原子和分子物理 原子和分子物理
- 材料科学 材料科学 材料科学
- 同步子辐射科学科学
背景情况:
- 射线光谱是具有广泛应用的关键分析技术.
- 现有的X射线发射光谱 (XES) 装置中的波长分散光谱仪面临测量不确定性,原因是样品位置依赖的能量校准.
研究的目的:
- 在极光基础设施光束线设施中引入一个新的X射线发射光谱站.
- 提高XES测量的精度和可靠性,特别是对于包括液体在内的各种样品类型.
- 解决和减轻XES能源校准中的不确定性来源.
主要方法:
- 在XES仪器上使用了·哈莫斯的几何.
- 实施了一种新的双摄像头系统,用于精确控制源位置.
- 开发了一种直接的能量校准程序,用于液体和粉末样本,使用薄膜参考.
- 演示了碰撞喷气液体样本输送系统的使用.
主要成果:
- 首次成功地对液化K3Fe (CN) 6和粉末/液化FeNH4 (SO4) 2.4.2的Kα线进行了实验性确定.
- 验证了一种可靠的源位置控制方法,减少校准不确定性.
- 建立了一个可靠的能量校准程序,适用于各种样品状态 (液体,粉末).
- 展示了使用先进的输送系统对液体样本进行现场XES分析的可行性.
结论:
- 新的XES站为分析包括液体在内的各种样品类型提供了更高的准确性和可靠性.
- 开发的源位置控制和校准方法有效地降低了测量不确定性.
- 这种仪器提高了XES现场研究的能力,为研究开辟了新的途径.
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