SGER: Lasar Raman Spectroscopic Studies of the Structure andDynamics of Silicate Melts at Ultra High Temperatures

9316970 Ghose该探索性研究计划的主要目标是通过原位激光拉曼光谱法研究硅酸镁熔体的结构和动力学，同时将CO2激光加热到~ 3000 oK的温度。实验涉及使用CO2激光束在硅酸镁玻璃或晶体板中创建局部熔体。用玻璃或水晶板作为局部熔化的坩埚。 从熔融区的拉曼散射数据将被解释从传统的和量子分子动力学模拟的基础上大的原子团簇。 实验观察和理论计算的振动光谱和径向分布函数的良好匹配将确保导出的熔体结构的正确性，这反过来将被用来计算它们的热力学和物理性质，包括粘度。

9316970 Ghose The principal objective of this exploratory research program is to study the structure and dynamics of magnesium silicate melts by in situ laser Raman spectroscopy with simultaneous CO2 laser heating to temperatures of ~3000oK The experiments involve creation of a localized melt in a magnesium silicate glass or crystal plate using a CO2 laser beam - with the glass or crystal plate to act as the crucible for the localized melt. Raman scattering data from the melt area will be interpreted from conventional and quantum molecular dynamics simulations based on large atomic clusters. A good match of the experimentally observed and theoretically calculated vibrational spectra and radial distribution functions will ensure the correctness of the derived melt structures, which in turn will be used to calculate their thermodynamic and physical properties, including viscosity.