A New Method for the Raman Spectra Calculation of Vitreous or Molten Silicate |
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作者姓名: | 吴永全 蒋国昌 |
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作者单位: | ShanghaiEnhancedLaboratoryofFerro-metallurgy,ShanghaiUniversity,Shanghai200072 |
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摘 要: | A new method is deduced to calculated the Raman spectra of vitreous or molten silicate.This method includes five steps:(i) molecular dynamics simulation to generate thousands of vitreous or molten configurations in equilibrium;(ii)decomposing the configurations into five kinds of defined tetrahedral units;(iii) normal vibrational analysis with Wilson‘s GF matrix method for the eigenfrequencies and eigenvectors of each tetrahedral unit;(iV) Raman intensity calculations for each vibrational mode by utilizing the electro-optical parameter method and bond polarizability model;(v)accumulating the data of frequencies and corresponding intensities to form the prtial Raman spectral line of each defined tetrahedral unit and finally the envelope.
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关 键 词: | 玻璃 喇曼光谱 新计算法 |
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