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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.)

Sao Paulo potential version 2 (SPP2) and Brazilian nuclear potential (BNP)

Full text
Author(s):
Chamon, L. C. [1] ; Carlson, V, B. ; Gasques, L. R. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Fis, Rua Matao 1371, BR-05508090 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: COMPUTER PHYSICS COMMUNICATIONS; v. 267, OCT 2021.
Web of Science Citations: 0
Abstract

The REGINA code calculates the Sao Paulo potential version 2 (SPP2) and the Brazilian nuclear potential (BNP). The code also provides nuclear densities obtained from the Dirac-Hartree-Bogoliubov model, which are used to calculate the nuclear potentials. Elastic scattering cross sections are obtained within the context of the optical model, with different options for the real and imaginary parts of the optical potential. In this manuscript, we provide a summary of the theoretical framework and information about the use of the code. Program summary Program Title: REGINA.f CPC Library link to program files: https://doi .org /10 .17632 /vfkkjb8dv7.1 Licensing provisions: GPLv3 Programming language: Fortran-77 Nature of problem: We provide a code to calculate the nuclear potential between two nuclei according to two different models: the Sao Paulo potential version 2 (SPP2), that includes a dependence on the relative velocity between the nuclei, and the velocity independent Brazilian nuclear potential (BNP). These potentials assume the effective nuclear interactions proposed in {[}1,2], and are obtained within the double-folding approach with nuclear densities calculated through the Dirac-Hartree-Bogoliubov model {[}3]. Solution method: The code involves two files containing previously calculated results for theoretical neutron and proton distributions and also experimental charge densities obtained from electron scattering experiments. These results are used to obtain matter densities through convolution using Fourier transforms. The Fourier transform method is also employed to obtain the double-folding potentials. Integration of the Schrodinger equation with a complex optical potential is performed using the Cowell method {[}4,5]. With this, for a given system and energy, we obtain the S-matrix and the elastic scattering cross sections. Additional comments including restrictions and unusual features: The maximum angular momentum supported in the optical model calculations is 2000. (C) 2021 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 19/07767-1 - Nuclear reactions with weakly-bound or cluster-structured radioactive and stable nuclei
Grantee:Leandro Romero Gasques
Support Opportunities: Research Projects - Thematic Grants
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 Opportunities: Research Projects - Thematic Grants
FAPESP's process: 18/09998-8 - Towards a modern array of particle detectors: a versatile tool for nuclear reaction studies
Grantee:Leandro Romero Gasques
Support Opportunities: Regular Research Grants