SEARCH Articles Figures Tables ACCSA sudden approximation Adiabatic and Sudden Approximations Adiabatic capture and centrifugal sudden approximations Adiabatic capture centrifugal sudden approximation Adiabatic channel centrifugal sudden approximation Adiabatically capture, centrifugal sudden approximation (ACCSA Centrifugal sudden approximation Energy sudden approximation Infinite order sudden approximation IOSA) Infinite-order sudden approximation Photoelectron sudden approximation Reactive infinite-order sudden approximate Rotational Infinite Order Sudden Approximation Rotational sudden approximation Sudden approximation impurity Sudden approximation theory Sudden approximation, appropriate for rotational excitation