Gharibshahi Elham, Alamaniotis Miltos
Department of Physics and Astronomy, The University of Texas at San Antonio (UTSA), One UTSA Circle, San Antonio, TX 78249, USA.
Department of Electrical and Computer Engineering, The University of Texas at San Antonio (UTSA), One UTSA Circle, San Antonio, TX 78249, USA.
Nanomaterials (Basel). 2022 May 17;12(10):1710. doi: 10.3390/nano12101710.
In this work, the optical characteristics of uranium (U), lead (Pb), cobalt (Co), and thorium (Th) nanoparticles are fashioned and simulated employing the finite element analysis (FEA) approach concerning multiple particle sizes. Applying finite element analysis, it was found that the simulated absorption peaks of electronic excitations of nuclear nanoparticles are red-shifted from 365 nm to 555 nm for U; from 355 nm to 550 nm for Pb; from 415 nm to 610 nm for Co; and from 350 nm to 540 nm for Th, comparing expanding particle sizes from 60 nm to 100 nm (except for Co, which varied from 70 nm to 100 nm). The FEA-simulated optical band gap energies and far-field radiation patterns were also obtained for nuclear materials. The simulation approach in this research enables the prediction of optical properties and design of nuclear materials before manufacture for nuclear security applications.
在这项工作中，采用有限元分析（FEA）方法，针对多种粒径对铀（U）、铅（Pb）、钴（Co）和钍（Th）纳米颗粒的光学特性进行了塑造和模拟。通过有限元分析发现，对于U，核纳米颗粒电子激发的模拟吸收峰从365纳米红移至555纳米；对于Pb，从355纳米红移至550纳米；对于Co，从415纳米红移至610纳米；对于Th，从350纳米红移至540纳米，这是在将粒径从60纳米扩大至100纳米时的情况（Co除外，其粒径从70纳米变化至100纳米）。还获得了核材料的有限元分析模拟光学带隙能量和远场辐射模式。本研究中的模拟方法能够在制造用于核安全应用的核材料之前预测其光学性质并进行设计。
