Probing the microscopic slow structural relaxation in oxide glasses by X‐ray photon correlation spectroscopy (XPCS) revealed faster than expected dynamics induced by the X‐ray illumination. The fast beam‐induced dynamics mask true slow structural relaxation in glasses and challenges application of XPCS to probe the atomic dynamics in oxide glasses. Here an approach that allows estimation of the true relaxation time of the sample in the presence of beam‐induced dynamics is presented. The method requires two measurements either with different X‐ray beam intensities or at different temperatures. Using numerical simulations it is shown that the slowest estimated true relaxation time is limited by the accuracy of the measured relaxation times of the sample. By analyzing the reported microscopic dynamics in SiO₂, GeO₂ and B₂O₃ glasses, it is concluded that the beam‐induced dynamics show rich behavior depending on the sample.

中文翻译：

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从氧化物玻璃中的束感应原子运动中解译出内在动力学。

用X射线光子相关光谱法（XPCS）探测氧化物玻璃的微观缓慢结构弛豫，发现其动力学快于X射线照射引起的预期动力学。快速的束流动力学掩盖了玻璃中真正缓慢的结构弛豫，并挑战了XPCS在探测氧化物玻璃中原子动力学方面的应用。本文提出了一种方法，该方法可以估算在存在束流动力学的情况下样品的真实弛豫时间。该方法需要使用不同的X射线束强度或不同的温度进行两次测量。使用数值模拟表明，最慢的估计真实弛豫时间受到样品测得的弛豫时间精度的限制。通过分析报告的SiO ₂微观动力学，GeO ₂和B ₂ O ₃玻璃，可以得出结论，光束诱导的动力学表现出丰富的行为，具体取决于样品。