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首页> 外文期刊>Journal of synchrotron radiation >Environment of Pr in fluorozirconate glasses: an XAFS and anomalous X-ray scattering study
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Environment of Pr in fluorozirconate glasses: an XAFS and anomalous X-ray scattering study

机译:氟锆酸盐玻璃中Pr的环境:XAFS和异常X射线散射研究

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摘要

We present a combined X-ray Absorption and Anomalous X-ray Scattering (AXRS) study of the local atomic structure around Pr in fluorozirconate glasses. Exploiting the high flux available at high energy at third generation sources, Pr K-edge (approx approx 42 keV) data obtained with both techniques on a Pr-doped (10000 ppm), unmodified, fluorozirconate glass, which complement our recently published EXAFS investigation on modified glasses. The common conclusion is that the local Pr environment is independent from the doping precursor and that no first or second shell Pr-Pr correlations are present, even in samples having a Pr~(3+) concentration of 10000 ppm, i.e. one order of magnitude higher than the concentration quenching limit.
机译:我们提出了在氟锆酸盐玻璃中围绕Pr的局部原子结构的组合X射线吸收和异常X射线散射(AXRS)研究。利用第三代能源在高能量下可获得的高通量,通过这两种技术在掺Pr(10000 ppm),未改性的氟锆酸盐玻璃上通过两种技术获得的Pr K-edge(约42 keV)数据,补充了我们最近发表的EXAFS研究在修改过的眼镜上。共同的结论是,本地Pr环境与掺杂前驱物无关,即使存在Pr〜(3+)浓度为10000 ppm,即一个数量级的样品,也不存在第一或第二壳层Pr-Pr相关性。高于浓度淬灭极限。

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