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

9316970 Ghose这个探索性研究计划的主要目标是通过激光拉曼光谱原位研究硅酸镁熔体的结构和动力学，同时将二氧化碳激光加热到~3000oK。实验涉及使用二氧化碳激光在硅酸镁玻璃或水晶板中创建局部熔体-以玻璃或水晶板作为局部熔体的坩埚。来自熔融区的拉曼散射数据将从传统的和基于大原子团簇的量子分子动力学模拟中得到解释。实验观测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推导出的熔体结构的正确性，这些结构将被用于计算其热力学和物理性质，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.