Co-refinement of multiple-contrast neutron/X-ray reflectivity data using MOTOFIT
Co-refinement of multiple-contrast neutron/X-ray reflectivity data using MOTOFIT
复制标题
DOI：
10.1107/s0021889806005073
复制
发表时间：
2006-04-01
影响因子：
6.1
通讯作者：
Nelson, A
中科院分区：
文献类型：
--
作者：
Nelson, A
对比变化技术用于多重对比中子/ x射线反射实验，以突出存在于表面或界面上的不同结构成分的散射。该技术的优点是用于描述界面散射长度密度分布的结构模型必须适用于所有测量的对比。在IGOR Pro环境（http://www.wavemetrics.com）中运行的一个新的反射率分析包MOTOFIT已经创建，以帮助同时拟合（使用相同的结构模型）这些多重对比度数据，使用直观的图形用户界面，这是大多数共精化包不具备的。MOTOFIT使用板模型方法和Abeles矩阵方法，并对表面粗糙度进行扩展，对实验反射率曲线进行非线性最小二乘回归。其他功能，如创建复杂的参数间约束或分析多层反射率，模拟退火等，使MOTOFIT成为强大的反射分析包
The contrast-variation technique is employed in multiple-contrast neutron/X-ray reflectometry experiments to highlight scattering from different structural components that are present at a surface or interface. The advantage of this technique is that the structural model used to describe the interfacial scattering length density profile must apply to all the contrasts measured. A new reflectivity analysis package, MOTOFIT, which runs in the IGOR Pro environment (http://www.wavemetrics.com), has been created to aid the simultaneous fitting (with the same structural model) of these multiple-contrast data, using an intuitive graphical user interface, which most co-refinement packages do not possess. MOTOFIT uses a slab-model approach with the Abeles matrix method, and extensions for surface roughness to perform nonlinear least-squares regression on the experimental reflectivity curves. Other features, such as the ability to create complicated interparameter constraints or analyse reflectivity from multilayers, simulated annealing, etc., make MOTOFIT a powerful reflectometry analysis package