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Coherence volumes and neutron scattering

机译:相干体积和中子散射

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We describe neutron scattering in a space-time frame-complementary to the van Hove picture. Based on the theory of partial coherence from light optics, neutron beams may be represented by correlation volumes, which are defined by the wavelength distribution and by optical elements like guides, slits, choppers or crystals. Size and shape of these tiny volumes tin space and time determine the volume of coherent interaction within the samples, which are represented by pair correlation functions. The beam correlation volumes also determine the resolution or the experiment and if the signal is proportional to a Fourier transform of the sample correlation function. Here we give a simple approach to this theory with various examples, (C) 1998 Elsevier Science B.V. All lights reserved. [References: 20]
机译:我们描述了在空时帧中与范霍夫图片互补的中子散射。基于来自光学器件的部分相干理论,中子束可以用相关体积表示,该相关体积由波长分布和光学元件(如光导,狭缝,斩波器或晶体)定义。这些微小体积的大小和形状以及空间和时间决定了样本中相干相互作用的体积,这由对相关函数表示。光束相关体积还决定分辨率或实验,以及信号是否与样本相关函数的傅立叶变换成比例。在这里,我们以各种示例为该理论提供了一种简单的方法,(C)1998 Elsevier Science B.V.保留所有照明灯。 [参考:20]

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