Collaborative Research: Hyperspherical Hidden Crossing Method Applied to Positron-Alkali and Positron-Hydrogen Collisions at Low Energies

该项目是将超球隐交叉方法（HHCM）应用于正电子-原子散射。正电子-碱金属碰撞将在有两个开放通道，弹性散射和正电子素形成的能量范围内进行研究。对于正电子-氢碰撞，计划是将以前的双通道计算扩展到包括氢的n=2态的激发。HHCM是研究三个任意质量带电粒子碰撞动力学的一种新方法，它是理解原子碰撞动力学的基础，也是研究三个任意质量带电粒子碰撞动力学的一种新方法。HHCM方法与超球方法的一个重要特点是将激发和重排过程同等对待，这对于正电子-原子碰撞中正电子素的形成是很重要的。

The proposed project is an application of the hyperspherical hidden crossing method(HHCM) to positron-atom scattering. Positron-alkali collisions will be investigated inthe energy range where there are two open channels, elastic scattering and positroniumformation. For positron-hydrogen collisions, the plan is to extend previous two-channelcalculations to include excitation to the n=2 states of hydrogen. The objective of thisinvestigation is to provide insight into the dynamics of three charged particles which isbasic to the understanding of the dynamics of atomic collisions.The HHCM is well suited for the study of collisions involving three charged particles ofarbitrary mass. An important feature that the HHCM method shares with the hypersphericalmethod is that it treats excitation and the rearrangement process on equal footing.This is important for positronium formation in positron-atom collisions.