正电子冲击下氦电离三重微分截面的理论计算

我们发展了一种正电子碰撞原子电离的畸变波Born近似方法， 在这个方法中，正负电子偶素通道通过一个ab initio的光学势附加到入射粒子和靶的相互作用势上，且通道对电离作用被第一次被考虑在正电子碰撞原子电离的过程中. 应用这个方法计算了在50 eV入射能量范围氦的电离的三重微分截面，计算结果和实验数据很好的符合.     

Positronium Formation in e^＋-K Collision at Low Energies

Positronium (Ps) formation cross section for positron scattering on potassium is calculated at low impact energies (0.2-15.0eV). The present calculation uses an optical-model method with an equivalent local polarization potential. The results for the Ps (n = 1) and Ps (n = 2) formation cross sections are calculated and compared with the experimental measurements and other theoretical results.