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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Ab initio folding potentials for nucleon-nucleus scattering based on no-core shell-model one-body densities

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Autor(es):
Burrows, M. [1, 2] ; Elster, Ch [1, 2] ; Weppner, S. P. [3] ; Launey, K. D. [4] ; Maris, P. [5] ; Nogga, A. [6, 7] ; Popa, G. [1, 2]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 - USA
[2] Ohio Univ, Inst Nucl & Particle Phys, Athens, OH 45701 - USA
[3] Eckerd Coll, Nat Sci, St Petersburg, FL 33711 - USA
[4] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 - USA
[5] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 - USA
[6] Forschungszentrum Julich, IAS 4, IKP 3, JHCP, D-52428 Julich - Germany
[7] Forschungszentrum Julich, JARA HPC, D-52428 Julich - Germany
Número total de Afiliações: 7
Tipo de documento: Artigo Científico
Fonte: Physical Review C; v. 99, n. 4 APR 15 2019.
Citações Web of Science: 2
Resumo

Background: Calculating microscopic optical potentials for elastic nucleon-nucleus scattering has already led to large body of work in the past. For folding first-order calculations the nucleon-nucleon (NN) interaction and the one-body density of the nucleus were taken as input to rigorous calculations in a spectator expansion of the multiple scattering series. Purpose: Based on the Watson expansion of the multiple scattering series we employ a nonlocal translationally invariant nuclear density derived from a chiral next-to-next-to-leading order (NNLO) and the very same interaction for consistent full-folding calculation of the effective (optical) potential for nucleon-nucleus scattering for light nuclei. Methods: The first order effective (optical) folding potential is computed by integrating over the nonlocal, translationally invariant NCSM one-body density and the off-shell Wolfenstein amplitudes A and C. The resulting nonlocal potential serves as input for a momentum-space Lippmann-Schwinger equation, whose solutions are summed to obtain the nucleon-nucleus scattering observables. Results: We calculate scattering observables, such as total, reaction, and differential cross sections as well as the analyzing power and the spin-rotation parameter, for elastic scattering of protons and neutrons from He-4, He-6, C-12, and O-16, in the energy regime between 100 and 200 MeV projectile kinetic energy, and compare to available data. Conclusions: Our calculations show that the effective nucleon-nucleus potential obtained from the first-order term in the spectator expansion of the multiple scattering expansion describes experiments very well to about 60 degrees in the center-of-mass frame, which coincides roughly with the validity of the NNLO chiral interaction used to calculate both the NN amplitudes and the one-body nuclear density. (AU)

Processo FAPESP: 17/19371-0 - Cálculos Dyson-Schwinger e Bethe-Salpeter no espaço euclideano e de Minkowski em QED e QCD
Beneficiário:Tobias Frederico
Linha de fomento: Auxílio à Pesquisa - Pesquisador Visitante - Internacional