钠团簇中的集体偶极激发
Collective dipole excitations in sodium clusters
摘要：
一些属性的小型和中型钠团簇内的RPA方法使用一个投影球形单粒子的基础上描述。用类Schiff偶极跃迁算符计算的振子强度和洛伦兹函数折叠的振子强度被用来计算光吸收截面谱。结果进一步被用来建立等离子体频率的集群组件的数量上的依赖关系。计算了在RPA偶极态激发下团簇的静电极化率。我们的结果与相应的实验数据的比较显示出总体良好的协议。
英文摘要：
Some properties of small and medium sodium clusters are described within the RPA approach using a projected spherical single particle basis. The oscillator strengths calculated with a Schiff-like dipole transition operator and folded with Lorentzian functions are used to calculate the photoabsorbtion cross section spectra. The results are further employed to establish the dependence of the plasmon frequency on the number of cluster components. Static electric polarizabilities of the clusters excited in a RPA dipole state are also calculated. Comparison of our results with the corresponding experimental data show an overall good agreement.
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