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首页> 外文期刊>The Journal of Chemical Physics >Suppression of multiple scattering for the critical mixture polystyrene/cyclohexane: Application of the one-beam cross correlation technique
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Suppression of multiple scattering for the critical mixture polystyrene/cyclohexane: Application of the one-beam cross correlation technique

机译：关键混合物聚苯乙烯/环己烷的多重散射抑制：单光束互相关技术的应用

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摘要

Multiple scattering becomes a problem close to the critical point, especially in systems with a large difference in the refractive index and large correlation length amplitudes as for the case of polystyrene/cyclohexane. In this work we demonstrate the application of the one-beam cross correlation technique and show that in the reduced temperature range of t_(red) = 1.66 X 10~(-5) -0.03 the multiple scattering is successfully suppressed. Furthermore, we measured the angular dependent static cattering intensity. By using the amplitude of the cross correlation function we obtained the correct singly scattered intensities. Those corrected intensities can be analyzed in the framework of the Ornstei-Zernike plot to obtain the correlation length xi. The analysis of the obtained static data is in good agreement with the dynamic data. Limitations for temperature and angular dependent measurements in the Ornstein-Zernike lot close to T_c are discussed in detail.
机译：多重散射成为接近临界点的问题，尤其是对于聚苯乙烯/环己烷而言，在折射率差异大且相关长度幅度大的系统中。在这项工作中，我们演示了单光束互相关技术的应用，并表明在降低的温度范围t_（red）= 1.66 X 10〜（-5）-0.03中，多次散射得到了成功抑制。此外，我们测量了与角度相关的静态遮蔽强度。通过使用互相关函数的振幅，我们获得了正确的单个散射强度。可以在Ornstei-Zernike图的框架中分析那些校正后的强度，以获得相关长度xi。所获得的静态数据的分析与动态数据非常吻合。详细讨论了Ornstein-Zernike批次中接近T_c的温度和角度相关测量的局限性。

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