The lattice stiffening transition in UO2 single crystals
The lattice stiffening transition in UO2 single crystals
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UO2 单晶中的晶格硬化转变
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
P. Dowben
中科院分区：
文献类型：
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作者：
Christopher Young;J. Petrosky;J. Mann;E. Hunt;David Turner;David Turner;P. Dowben
利用变温X射线光电子能谱测量了水热合成法制备的UO 2单晶在300 K ~ 623 K温度范围内表面区域的有效德拜温度（ΘDE）。在475 K以下的500 ± 59 K和475 K以上的165 ± 21 K的不同有效德拜温度区域，发现了一个晶格硬化转变。UO 2的有效德拜温度的温度依赖性的比较，与UO 2的晶格膨胀系数的变化，支持强晶格声子相互作用所产生的Jahn-Teller失真。
The effective Debye temperatures (ΘDE) of the surface region of UO2 single crystals, prepared by the hydrothermal synthesis technique, were obtained from temperature-dependent x-ray photoemission in the temperature range of 300 K–623 K. A lattice stiffening transition, characterized by different regions of different effective Debye temperature, 500 ± 59 K below 475 K and 165 ± 21 K above 475 K is identified. A comparison of the temperature dependence of the effective UO2 Debye temperature, with the changes in the lattice expansion coefficient for UO2, support strong lattice-phonon interaction arising from the Jahn–Teller distortion.