Nucleon-induced inelastic scattering with statistical strength functions and the ECIS direct reaction code

Autor(es)

Chimanski, V, E. ; Carlson, V, B.

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN PHYSICAL JOURNAL A; v. 57, n. 6 JUN 2021.
• Citações Web of Science: 0

Resumo

Modern theoretical descriptions of inelastic scattering make use of multi-step direct reaction approaches together with transition potentials obtained from sophisticated nuclear structure models. Here we demonstrate how the complexity of such calculations can be reduced to permit simpler ones, also using the ECIS code, but providing an almost equally precise alternative to a much more detailed calculation. We have studied the transition form factors within the random phase approximation (RPA), where these are obtained as linear combinations of particle-hole states. At moderate to high excitation energies, where interference effects tend to disappear, we have proposed an independent particle-hole formalism in which particle-hole states are spread in energy with an appropriate strength function obtained from the RPA. The effects of more complex modes, such as 2p-2h ones, are simulated with widths calculated in a semi-classical context. Here, we verify the validity of our approximations for pre-equilibrium proton-induced reactions on Zr-90 target. Our calculations provide a good description of the reaction data and point toward a simplification of the description of nucleon-induced reactions based on averages of microscopic details of the projectile-target interaction. (AU)

• Processo FAPESP: 17/13693-5 - Comparação de cálculos de reações de pré-equilíbrio em modelos de reações diretas de múltiplas etapas
• Beneficiário: Emanuel Vicente Chimanski
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 16/07398-8 - Extensão do formalismo quântico de reações diretas de múltiplas etapas
• Beneficiário: Emanuel Vicente Chimanski
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/05660-0 - Estudos teóricos da estrutura e reações de núcleos exóticos e sistemas de muitos corpos
• Beneficiário: Brett Vern Carlson
• Modalidade de apoio: Auxílio à Pesquisa - Temático