Atomic Collisions of Low Relative Velocity
<p>Approximate solutions for the excitation of an atom by a colliding charged particle, developed as perturbations of the state of the system at infinite or asymptotic separation of atom and particle and also as perturbations of the state of the system at vanishing velocity of relative...
Internet
https://thesis.library.caltech.edu/10491/1/Richardson_A_1952.pdfRichardson, Audre (1952) Atomic Collisions of Low Relative Velocity. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/9XYR-VS30. https://resolver.caltech.edu/CaltechTHESIS:10052017-153013846 <https://resolver.caltech.edu/CaltechTHESIS:10052017-153013846>