Presentation
Treatment of continuum in nuclear reactions involving weakly bound systems. A simple model to test different prescriptions describing the coupling to continuum states.
Author/s | Dasso, Carlos Hugo
Vitturi, A. |
Department | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Publication Date | 2009 |
Deposit Date | 2020-09-17 |
Published in |
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ISBN/ISSN | 978-0-7354-0631-5 0094-243X (impreso) 1551-7616 (electrónico) |
Abstract | We exploit a model describing the break-up of weakly-bound nuclei that can be used as a laboratory for testing different prescriptions that have been advanced in the literature to take into account the near-by presence of ... We exploit a model describing the break-up of weakly-bound nuclei that can be used as a laboratory for testing different prescriptions that have been advanced in the literature to take into account the near-by presence of continuum states. In the model we follow the evolution of a single particle wave function in one dimension, initially bound by a Woods-Saxon type potential and then perturbed by a time- and position-dependent external field. Proper choices of this potential can simulate the effect of the interaction between reaction partners in a nuclear collision. These processes generate inelastic excitation probabilities that - distributed over the bound and continuum states of the system - lead to either a partial or a total fragmentation of the final wave function. The comparison with the exact calculations shows that standard coupled channel descriptions based on discretization of the continuum can be accurate only when a proper choice is made of the number of discrete states, of the energy mesh and of the energy cutoff. This may imply, even in simplified cases. the use of a rather large (and unpracticable) number of channels. The use of a more restricted number of channels may lead to misleading results. |
Citation | Dasso, C.H. y Vitturi, A. (2009). Treatment of continuum in nuclear reactions involving weakly bound systems. A simple model to test different prescriptions describing the coupling to continuum states.. En International Conference on New Aspects of Heavy Ion Collisions near the Coulomb Barrier (264-269), Chicago, Illinois (Estados Unidos): American Institute of Physics. |
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