低能正电子与He,Ne,Ar原子弹性散射的研究

Study on Low-energy Differential Scattering of Positrons from He, Ne and Ar With the Model-potential Method

用模型势方法和STO波函数,对正电子与氦、氖、氩原子弹性散射角分布(非弹性阈值以下,散射角从20°到160°)进行了系统的计算,结果与已有的理论和实验数据吻合.通过对计算所得的大量微分截面数据的分析,总结了低能正电子与惰性气体原子弹性散射的规律.

Lowenergy differential scattering of positrons from He, Ne and Ar atoms have been calculated systemically by using the method of the model potential and STO wave function at energies below the lowest inelastic thresholds and the range of scattering angle of 20° to 160° in this work. The calculated differential crosssection curves compare quite well with available experimental and theoretical cross sections. The regularity of the angular distributions of the elastic scattering have been obtained by analysis the numerical results of different cross sections.