计算正电子与钾原子碰撞的总散射截面

应用耦合通道光学势方法计算低能正电子同钾原子碰撞的总散射截面． 在 Ｐ 空间的耦合积分方程中包括 ８ 个能量最低的散射通道， 用 Ｑ 空间的复光学势描述的正负电子偶素所形成的通道和电离通道， 被附加到 Ｐ 空间的通道耦合中． 计算结果表明， 电离和正负电子偶素的形成在正电子和钾原子碰撞散射体系中起着重要的作用．

Calculation of Total Cross Sections for Positron Scattering on Potassium Atom

Total cross sections for positron scattering on potassium were calculated at low energies by means of the coupled channels optical method. The lowest 8 channels were included in the coupled integral equations for P space. The target continuum and positronium formation channels for Q space are represented by adding a complex optical potential to the coupled equations of P space. Present calculation results show that ionization continuum and positronium formation channels play an important role in positron potassium scattering.