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SMALL-ANGLE NEUTRON SCATTERING AND BlOMOLECULES

机译:小角度中子散射和气泡

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摘要

Soft materials, both polymeric and biologically relevant, are rich in hydrogen. By coincidence, neutrons have the uniquecapability of scattering differently from hydrogen (coherentscattering length of hydrogen, bH = -0.37*10~(-12)cm) aH has a negative scattering length giving it "contrast" pared to its isotope deuterium (bD = 0.67x 10~(12)cm). As a when surrounded by other, positive scattering lengthresult of this marked difference in scattering power (contrast)between native hydrogenated materials and their counterparts synthesized from deuterated monomer units, neutron scattering techniques have proven to be powerful tools for the study of soft condensed matter systems. Here, we will discuss the small-angle neutron scattering (SANS) technique, which is presently playing a pivotal role in extracting unique structural information from intrinsically disordered systems.
机译:聚合物和生物学相关的软材料富含氢。碰巧的是,中子具有与氢不同的独特散射能力(氢的相干散射长度,bH = -0.37 * 10〜(-12)cm)。aH具有负的散射长度,使其与同位素氘相比具有“对比度”(bD = 0.67x 10〜(12)cm)。当天然氢化材料与氘代单体单元合成的对应材料之间的散射能力(对比度)存在明显差异时,中子散射技术已被证明是研究软冷凝物系统的有力工具。在这里,我们将讨论小角度中子散射(SANS)技术,该技术目前在从内在无序的系统中提取独特的结构信息方面起着举足轻重的作用。

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