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Structural correlation in water probed by hyper-Rayleigh scattering

机译:超瑞利散射探测水中的结构相关性

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Second-harmonic or hyper-Rayleigh scattering (HRS) is sensitive to molecular interactions and correlations, and there is a large coherent HRS contribution for water. This work shows that the distinctive angle and polarization dependence observed for HRS from water is due to the long-range orientation correlation of the molecules. The results of HRS experiments for water are analyzed in combination with a molecular dynamics simulation to determine the molecular hyperpolarizability and the short-range and long-range orientation correlation functions for the molecules. At long range, the longitudinal and transverse dipole-dipole orientation correlation functions are B-L(r) = -2B(T)(r) = a(3)/r(3) with a = 0.166 nm. Molecular correlation at distances r > 100 nm must be included to account for the HRS observations. Published by AIP Publishing.
机译:二次谐波或超瑞利散射(HRS)对分子相互作用和相关性敏感,并且存在大的HRS对水的贡献。 该工作表明,从水中观察HRS的独特角度和偏振依赖性是由于分子的远程取向相关性。 HRS水实验的结果与分子动力学模拟结合分析,以确定分子的分子超极化性和短距离和远程取向相关功能。 在长范围内,纵向和横向偶极偶极偶极取向相关函数是B-L(R)= -2b(t)(r)= a(3)/ r(3),具有= 0.166nm。 必须包括在距离R> 100nm时的分子相关,以考虑HRS观察。 通过AIP发布发布。

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