Deuteron Formation in Expanding Nuclear Matter from a Strong Coupling BCS Approach
Central heavy ion collisions at E/A in the 50 to 200 MeV range can roughly be described by the initial build up of compressed and hot nuclear matter and by a sequential decompression. Some of these reactions have recently been reported  to end up with final fragments not heavier than α-particles, at most. This is the kind of scenario we shall address in this work. Our main aim is to develop the first steps of a transport theory which goes beyond BUU in a systematic fashion to include light cluster formation in a consistent way. By the latter we mean that cluster formation is followed throughout the entire reaction process without any ad hoc switching on and off of clustering or coalescence processes. In such a way for example memory effects in the formation process and Pauli principle will be fully accounted for. We here shall be mainly concerned with deuteron formation. However, in the end we shall shortly touch upon α-particle production as well. Our theoretical tools will be based on BCS and quasi-particle RPA theory.
KeywordsNuclear Matter Cooper Pair Symmetric Nuclear Matter Single Particle Density Time Dependent Case
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