Abstract
Pre-equilibrium nuclear reactions occur on an intermediate time scale when compared to fast direct reactions and to the slow process of compound nucleus evaporation. They dominate the reaction spectra in a large range of energy, especially for fast incident projectiles. The quantum models developed so far describe the process as multiple collisions of an incident leading particle with the target nucleus. The low-energy excited states of the target can have several components forming a collective state. We present here, preliminary results on the description of such a state in the Random Phase Approximation that considers long and short range residual interactions beyond mean field. We have investigated the contributions of different particle–hole modes to the low-lying excited states of the target nucleus. In addition, a simplified model for the particle–hole basis is studied.
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Acknowledgements
EVC acknowledges financial support from grants 2016/07398-8 and 2017/13693-5 of the São Paulo Research Foundation (FAPESP). BVC acknowledges financial support from grant 2017/05660-0 of the São Paulo Research Foundation (FAPESP) and grant 306433/2017-6 of the CNPq. EVC and BVC acknowledge support from the INCT-FNA project 464898/2014-5.
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Chimanski, E.V., Capote, R., Carlson, B.V., Koning, A.J. (2021). Multi-step Direct Reaction Models Including Collectivity in Nucleon Induced Reactions. In: Escher, J., et al. Compound-Nuclear Reactions . Springer Proceedings in Physics, vol 254. Springer, Cham. https://doi.org/10.1007/978-3-030-58082-7_8
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DOI: https://doi.org/10.1007/978-3-030-58082-7_8
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