Resonant Charge Exchange in Atomic Collisions
Resonant Charge Exchange in Atomic Collisions
复制标题
DOI：
10.1103/physrev.131.229
复制
发表时间：
1963-07
期刊：
影响因子：
--
通讯作者：
W. Lichten
中科院分区：
文献类型：
--
作者：
W. Lichten
Everhart等人的显著结果，用碰撞参数法讨论了在宽角离子-原子碰撞中观察共振电荷交换时，结果表明，以往基于绝热势曲线的理论与He/sup +/- He实验结果不一致。然而，实验结果是正确的预测海森堡表示组成的基础设置的单组态波函数从分子轨道。这个集合包括虚拟状态。在这个表示中，除了非常短或非常长的碰撞时间之外，碰撞可以被假设为绝热的。双电荷交换的情况下处理，它示出，需要一个三态近似。经验方程中相移的存在是零碰撞时干扰崩溃的结果。阻尼进行了讨论。这些结果包括其他人的工作，并且足够普遍，可以包括新的案例。特别地，讨论了He/sup ++/He，Li/sup +/- Li和Li/sup ++/-- Li碰撞中的电荷交换，并对实验结果进行了预测。（auth）
The remarkable results of Everhart et al., in observing resonant charge exchange in wide angle ion-atom collisions, are discussed in terms of the well- known impact parameter method. It is shown that previous theories based on adiabatic potential curves are inconsistent with the results of He/sup +/- He experiments. However, experimental results are correctly predicted from a Heisenberg representation consisting of the basis set of single configuration wave functions built up from molecular orbitals. This set includes virtual states. In this representation, the collision can be assumed to be adiabatic except for very short or very long collision times. The case of double charge exchange is treated, and it is shown that a three-state approximation is required. The presence of phase shifts in empirical equations is a result of the breakdown of interference at zero-collision time. Damping is discussed. The results include the work of others and are general enough to include new cases. In particular, charge exchange in He/sup ++/He, Li/sup +/- Li, and Li/sup ++/-- Li collisions is discussed and predictions of experimental results are made. (auth)