论文标题
$^1 $^1 $ h的液体的结构研究通过偏振中子：化学环境和波长依赖性不一致的背景
Structural studies of $^1$H-containing liquids by polarized neutrons: chemical environment and wavelength dependence of the incoherent background
论文作者
论文摘要
在证明了如何应用极化分析中的中子衍射以准确地确定包含大量质子核的无序材料的相干静态结构因子（Temleitner等，Phys。Phys。Rev.B 92，014201，2015），我们现在将重点放在散射上。不一致的贡献是造成巨大困难的原因，同时从氢材料中处理标准（非极化）中子衍射数据，因此是问题的重要性。在这里，我们将液体丙酮，环己烷，甲醇和水的不连贯散射强度作为$^1 $ h/h的比率的功能。不连贯的强度是通过极化中子衍射直接确定的。这样，可以监视由于化学环境变化而导致的不连贯背景的可能变化。另外，对于某些水样，也测量了不连贯的强度与入射中子束的波长（0.4、0.5和0.8Å）的函数。发现在每种情况下，在统计误差中都可以通过单个高斯函数来描述不连贯的强度。高斯人的（最大）（最大）宽度显然取决于应用波长。另一方面，氢原子的不同键合环境似乎不会影响高斯的宽度。
Following a demonstration of how neutron diffraction with polarization analysis may be applied for the accurate determination of the coherent static structure factor of disordered materials containing substantial amounts of proton nuclei (Temleitner et al., Phys. Rev. B 92, 014201, 2015), we now focus on the incoherent scattering. Incoherent contributions are responsible for the great difficulties while processing standard (non-polarized) neutron diffraction data from hydrogenous materials, hence the importance of the issue. Here we report incoherent scattering intensities for liquid acetone, cyclohexane, methanol and water, as function of the $^1$H/H ratio. The incoherent intensities are determined directly by polarized neutron diffraction. This way, possible variations of the incoherent background due to the changing chemical environment may be monitored. In addition, for some of the water samples, incoherent intensities as a function of the wavelength of the incident neutron beam (at 0.4, 0.5 and 0.8 Å) have also been measured. It is found that in each case, the incoherent intensity can be described by a single Gaussian function, within statistical errors. The (full) width (at half maximum) of the Gaussians clearly depends on the applied wavelength. On the other hand, the different bonding environments of hydrogen atoms do not seem to affect the width of the Gaussian.
