Modeling positronium beyond the single particle approximation
Modeling positronium beyond the single particle approximation
复制标题
超越单粒子近似的正电子素建模
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
M. Puska
中科院分区：
文献类型：
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作者：
A. Zubiaga;M. Ervasti;I. Makkonen;A. Harju;F. Tuomisto;M. Puska
理解物质中正电子素原子的性质对于解释正电子湮没实验是很有意义的。该技术具有独特的能力，用于研究软分子材料（聚合物，液体或生物结构）和多孔材料中的纳米尺寸的空隙和孔隙。然而，对实验数据的详细解释依赖于对宿主材料中正电子素湮灭特性的建模。该技术的新应用正在开发中，但计算模型仍然基于单粒子方法，并且没有办法解决主体材料的电子性质的影响。在这项工作中，我们讨论了新的研究方向。
Understanding the properties of the positronium atom in matter is of interest for the interpretation of positron annihilation experiments. This technique has a unique capability for the investigation of nanometer sized voids and pores in soft molecular materials (polymers, liquids or biostructures) and porous materials. However, detailed interpretations of the experimental data rely on modeling of the annihilation properties of positronium in the host material. New applications of the technique are being developed but the computational models still are based on single particle approaches and there is no way to address the influence of the electronic properties of the host material. In this work we discuss new directions of research.