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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Chimanski, V, E. ; Carlson, V, B.
Total Authors: 2
Document type: Journal article
Source: EUROPEAN PHYSICAL JOURNAL A; v. 57, n. 6 JUN 2021.
Web of Science Citations: 0

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)

FAPESP's process: 17/13693-5 - Comparison of preequilibrium nuclear reaction calculations in multistep direct reaction models
Grantee:Emanuel Vicente Chimanski
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 16/07398-8 - Extension of the quantum formalism for direct multistep reactions
Grantee:Emanuel Vicente Chimanski
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 17/05660-0 - Theoretical studies of the structure and reactions of exotic nuclei and many-body systems
Grantee:Brett Vern Carlson
Support type: Research Projects - Thematic Grants