Frontiers in Atomic Physics—Introduction and Opening Remarks
Fragmentation, spectroscopy, and collisions represent three broad categories of atomic and molecular processes. We regard the formation of excited bound states in spectroscopic studies as fragmentations in which the fragments do not have enough energy to escape. Collisions are represented as the product of fragmentation reactions run in reverse in the initial state, and fragmentation reactions run in normal direction in the final state. The Jost functions form the mathematical framework for this picture. Issues that emerge naturally are the identification of appropriate reaction coordinates to describe the propagation of the system, the classification of the channels at large and small values of the reaction coordinate and the connection between the two regions.
KeywordsAtomic Process Reaction Coordinate Fragmentation Reaction Outgoing Wave Quantum Beat
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