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Genetic algorithm in the EPR study of powder spectra of charge-transfer tm-p-PD : Chloranil complex

机译:EPR研究中的遗传算法电荷转移tm-p-PD:氯腈配合物粉末光谱

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摘要

The temperature dependence of the electron paramagnetic resonance (EPR) powder spectra of tm-p-PD:Chloranil has been studied. A qualitative analysis of the spectra suggests that the line width of an unpaired spin center varies with temperature, g parameters may vary, too, but generally there is no simple way to assign parameters to the spectra unless the EPR data are confronted with an appropriate synthetic model. As a model for the detailed simulation and analysis, an orthorhombic spin Hamiltonian is adopted and an anisotropic line width of the paramagnetic charge-transfer center is assumed. The results are the best-fit values g(xx) , g(yy) , g(zz) and the three line width parameters, respectively. A genetic algorithm was designed for the EPR spectra best-fit search in the six-parameter space and the results were obtained automatically without operator intervention. The numerical procedure was accelerated with a computing cluster.
机译:研究了tm-p-PD:Chloranil的电子顺磁共振(EPR)粉末光谱的温度依赖性。对光谱的定性分析表明,不成对的自旋中心的线宽会随温度而变化,g参数也可能会变化,但是通常没有简单的方法为光谱分配参数,除非EPR数据面临适当的合成方法模型。作为详细的模拟和分析的模型,采用正交各向异性的哈密顿量,并假定顺磁性电荷转移中心的各向异性线宽。结果分别是最佳拟合值g(xx),g(yy),g(zz)和三个线宽参数。为六参数空间中的EPR光谱最佳搜索设计了一种遗传算法,无需操作员干预即可自动获得结果。借助计算机集群加快了数值过程。

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