Non local microscopic potentials for calculation of scattering observables of nucleons on deformed nuclei

Nasri, Amine; Dupuis, Marc; Blanchon, G.; Bauge, E.; Arellano, Hugo F.

doi:10.1051/epjconf/201714612036

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…This work is also being extended to include inelastic scattering of light charged particles. The model needs also to be completed to include unnatural parity excitations, and excitations beyond one particle-hole or one phonon states [24].…”

Section: Discussionmentioning

confidence: 99%

Microscopic description of target spin distribution after inelastic scattering to the continuum

et al. 2023

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Microscopic modeling of inelastic scattering to the continuum is applied to neutron induced reaction on spherical and axially deformed even-even targets. The spin distributions of the residual compound nucleus formed after the fast inelastic process are calculated with two microscopic models and compared to the prescription usually associated to the semi-classical exciton model. As the semi-classical exciton model does not account for angular momentum conservation, it is often assumed that it is the same as the compound nucleus spin distribution, but this forgets the dynamics of the reaction. It is found that microscopic approaches drastically reduce the average spin value in comparison to what was previously assumed. This strongly impacts (n,n’ γ) as well as isomer production cross sections when high spin levels are involved. New spin cut-off parameters are deduced from the microscopic calculations that can be used as an alternative to previous prescriptions which neglect the reaction dynamics when they are applied in the context of pre-equilibrium emission process.

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Section: Discussionmentioning

confidence: 99%

Microscopic description of target spin distribution after inelastic scattering to the continuum

et al. 2023

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“…Since the approach we present leads to actual solutions for the scattering waves, it is well suited for distorted-wave Born approximation for nuclear reactions. Additionally, the approach presented here is well suited for coupled-channels [26], with extension to inelastic processes underway [33].…”

Section: Discussion and Concluding Remarksmentioning

confidence: 99%

Exact scattering waves off nonlocal potentials under Coulomb interaction within Schrödinger's integro-differential equation

Arellano

Blanchon

2019

Physics Letters B

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An exact solution for the scattering wavefunction from a nonlocal potential in the presence of Coulomb interaction is presented. The approach is based on the construction of a Coulomb Green's function in coordinate space whose associated kernel involves any nonlocal optical potential superposed to the Coulombscreened interaction. The scattering wavefunction, exact solution of the integrodifferential Schrödinger's equation, poses no restrictions on the type of nonlocality of the interaction nor on the beam energy.

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Following J. Raynal’s DWBA and ECIS codes: coupled channels with microscopic non-local potential

et al. 2021

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Jacques Raynal provided two powerful tools to the nuclear reaction community interested in scattering processes, namely the ECISxx and DWBAxx computer codes (xx standing for the version year), which are renowned for both their numerical efficiency and the numerous applications they cover. The purpose of this work is twofold. First, it extends the possibilities of calculation of microscopic optical and transition potentials compared to what is proposed in the DWBA code. Then, following previous work by Arellano [Phys Rev C 76:014616, 2007], we develop a method to deal with coupled-channel calculations with non-local ingredients. Both codes DWBA and ECIS, and numerous past discussions with their author, offered guidance to elaborate and to validate new results focusing on neutron scattering off spin-0 target. Special attention has been paid to match the numerical precision of J. Raynal's tools. This was made possible by using a specific quadrature method for numerical integrations of functions with discontinuous derivatives.

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Non local microscopic potentials for calculation of scattering observables of nucleons on deformed nuclei

Cited by 3 publications

References 12 publications

Microscopic description of target spin distribution after inelastic scattering to the continuum

Microscopic description of target spin distribution after inelastic scattering to the continuum

Exact scattering waves off nonlocal potentials under Coulomb interaction within Schrödinger's integro-differential equation

Following J. Raynal’s DWBA and ECIS codes: coupled channels with microscopic non-local potential

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