μ-Raman spectroscopy of UO₂ has demonstrated its value as a tool in nuclear forensics and for analyzing nuclear fuels, but its ability to evaluate UO₂ sample quality has been relatively unexplored. To investigate this potential, a three-pronged study that uses Raman spectroscopy to analyze 1) three distinct qualities of UO₂ single crystals with two different excitation lasers, 2) a high quality single crystal UO₂ sample that is progressively damaged with a laser, and 3) a single crystal of UO₂ grown on top of a ThO₂ substrate was undertaken. The results demonstrate that the peak height ratio between the second order longitudinal optical phonon signal near 1145 cm⁻¹ and the T_2g peak located near 450 cm⁻¹ is directly correlated with crystal quality when a 532 nm excitation source is used. Furthermore, this observed pattern relies upon the two most intense peaks that are present in the Raman spectra, making it more robust to lower signal-to-noise ratios than similar trends present in the peak height ratio between the first order longitudinal optical phonon signal near 565 cm⁻¹ and the T_2g peak. Both peak height ratios are more sensitive indicators of the crystal quality than the width ratios of the same signals or the associated wavenumber shift in the T_2g peak location. The correlation between the 2LO and T_2g peak heights and the overall crystal quality offers the potential to directly assess and compare the quality of different samples of single crystal UO₂.

UO _2的μ拉曼光谱法已经证明了其作为核法证学和分析核燃料的工具的价值，但其评估UO ₂样品质量的能力尚未得到开发。为了研究这种潜力，一项三管齐下的研究使用拉曼光谱分析来分析：1）用两种不同的激发激光器分析三种不同质量的UO ₂单晶； 2）用激光逐渐损坏的高质量单晶UO ₂样品， 3）进行了在ThO ₂衬底的顶部上生长的UO _2的单晶。结果表明，1145 cm ^-1附近的二阶纵向光子声子信号之间的峰高比当使用532 nm激发源时，位于450 cm ^-1附近的T _2g峰与晶体质量直接相关。此外，该观察到的模式依赖于拉曼光谱中存在的两个最强烈的峰，因此与较低的一阶纵向光子声子信号之间的峰高比中存在的相似趋势相比，它具有更低的信噪比鲁棒性。 565 cm ^-1，T _2g峰。与相同信号的宽度比或T _2g峰位置中相关的波数移位相比，两个峰高比是晶体质量的更敏感指标。2LO与T _2g的相关性峰高和整体晶体质量提供了直接评估和比较单晶UO ₂不同样品质量的潜力。