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首页> 外文期刊>Journal of Materials Research >Excitons in sdntillator materials: Optical properties and electron-energy loss spectra of NaI, LaBr_3, BaI_2, and SrI_2
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Excitons in sdntillator materials: Optical properties and electron-energy loss spectra of NaI, LaBr_3, BaI_2, and SrI_2

机译：钝化材料中的激子：NaI，LaBr_3，BaI_2和SrI_2的光学性质和电子能谱

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摘要

Materials for scintillator radiation detectors need to fulfill a diverse set of requirements such as radiation hardness and highly specific response to incoming radiation, rendering them a target of current materials design efforts. Even though they are amenable to cutting-edge theoretical spectroscopy techniques, surprisingly many fundamental properties of scintillator materials are still unknown or not well explored. In this work, we use first-principles approaches to thoroughly study the optical properties of four scintillator materials: NaI, LaBr_3, BaI_2, and SrI_2. By solving the Bethe-Salpeter equation for the optical polarization function we study the influence of excitonic effects on dielectric and electron-energy loss functions. This work sheds light into fundamental optical properties of these four scintillator materials and lays the ground-work for future work that is geared toward accurate modeling and computational materials design of advanced radiation detectors with unprecedented energy resolution.
机译：闪烁体辐射探测器的材料需要满足多种要求，例如辐射硬度和对入射辐射的高度特异性响应，这使其成为当前材料设计工作的目标。尽管它们适用于最先进的理论光谱技术，但令人惊讶的是，闪烁体材料的许多基本特性仍然未知或未被很好地探索。在这项工作中，我们使用第一原理方法彻底研究了四种闪烁体材料的光学性质：NaI，LaBr_3，BaI_2和SrI_2。通过求解Bethe-Salpeter方程的光偏振函数，我们研究了激子效应对介电和电子能量损失函数的影响。这项工作揭示了这四种闪烁体材料的基本光学特性，并为将来的工作打下了基础，该工作将致力于以前所未有的能量分辨率对高级辐射探测器进行精确建模和计算材料设计。

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  • 来源
    《Journal of Materials Research》 |2017年第1期|56-63|共8页
  • 作者

    Andre Schleife; Xiao Zhang; Qi Li; Paul Erhart; Daniel Aberg;

  • 作者单位

    Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;

    Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;

    Physical Sciences Division IBM TJ Watson Research Center, NY 10598, USA Department of Computer Science, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;

    Department of Applied Physics, Chalmers University of Technology, Gothenburg SE-412 96, Sweden;

    Condensed Matter and Materials Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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