Reinterpreting the energy dependence of the optical potential

Chamon, L. C.; Gasques, L. R.

doi:10.1088/0954-3899/43/1/015107

Cited by 10 publications

(14 citation statements)

References 23 publications

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“…The overall results of a simultaneous data analyses of all measured energies, considering an internal Woods-Saxon imaginary optical potential, also corroborate this statement. In fact, quite similar behavior of the elastic scattering cross sections has been observed for many α-nucleus systems and might be related to the effect of couplings to inelastic states of very high excitation energies (even with negligible cross sections [29][30][31][32][33]. In addition, it would be interesting to investigate the effect of the breakup processes on the elastic scattering channel, possibly taking into account the excitation of the target.…”

Section: Discussion and Summarysupporting

confidence: 53%

Understanding the mechanisms of nuclear collisions: A complete study of the B10+Sn120 reaction

et al. 2021

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Background: Reactions involving exotic and stable weakly bound nuclei have been extensively studied in recent years. Although several models have been successfully used to explain particular reaction outcomes, the answers to many questions remain elusive. In previous works, we presented elastic, inelastic, and transfer angular distributions for the 10 B + 120 Sn system measured at E Lab = 31.5, 33.0, 35.0, and 37.5 MeV. The data set was analyzed through coupled reaction channels calculations in the context of the double-folding São Paulo potential. Purpose: We investigate nuclear reaction mechanisms for systems involving weakly bound projectiles. Method: Angular distributions for several nuclear reaction processes were measured for the 10 B + 120 Sn system at E Lab = 39.70 MeV. Results:The new data set involves angular distributions for elastic scattering, projectile and target inelastic excitations, one-neutron pickup transfer, one-proton stripping transfer, deuteron pickup transfer, and 3,4 He stripping transfer. We have also observed 10 Be nuclei. The effect of the couplings to some nonelastic states on the angular distributions is discussed. Conclusion:The theoretical calculations within the coupled reaction channels formalism provide an overall good agreement with the corresponding inelastic, one-neutron stripping, one-proton pickup, one-deuteron pickup, and 3 He stripping transfer data. However, to improve the description of the elastic scattering angular distribution, the inclusion of additional channels in the coupling scheme might be necessary.

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Section: Discussion and Summarysupporting

confidence: 53%

Understanding the mechanisms of nuclear collisions: A complete study of the B10+Sn120 reaction

et al. 2021

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“…In all calculations, the finite diffuseness of nuclear surfaces (discussed in Ref. [49]) was considered. The respective δ deformation lengths and the reduced matrix elements used in the calculations were obtained from these experimental values using expressions reported in Ref.…”

Section: A the 16 O+ 60 Ni Systemmentioning

confidence: 99%

Important role of projectile excitation in O16+Ni60 and O<

et al. 2018

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The elastic scattering angular distribution of the 16 O+ 60 Ni system at 260 MeV was measured in the range of the Rutherford cross section down to 7 orders of magnitude below. The cross sections of the lowest 2 + and 3 − inelastic states of the target were also measured over a several orders of magnitude range. Coupled channel (CC) calculations were performed and are shown to be compatible with the whole set of data only when including the excitation of the projectile and when the deformations of the imaginary part of the nuclear optical potential are taken into account. Similar results were obtained when the procedure is applied to the existing data on 16 O+ 27 Al elastic and inelastic scattering at 100 and 280 MeV. An analysis in terms of Dynamical Polarization Potentials (DPP) indicate the major role of coupled channel effects in the overlapping surface region of the colliding nuclei.

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“…To improve the agreement between data and theoretical results, it would probably be necessary to include other couplings that were not considered in the present CC calculations, such us inelastic excitation of other states and/or transfer processes. In the case of α+ 208 Pb, for instance, we have shown [30] that couplings to a large number of inelastic states with very high excitation energies can account for the elastic scattering data in a wide energy range. In this case, the effect of the couplings can not be simulated only by a surface absorption included in the optical potential, since the couplings to states with high excitation energies provide important contribution for the real part of the polarization potential.…”

Section: Data Analysesmentioning

confidence: 93%

Folding-type coupling potentials in the context of the generalized rotation–vibration model

Chamon¹,

Botero²

2018

J. Phys. G: Nucl. Part. Phys.

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The generalized rotation-vibration model was proposed in previous works to describe the structure of heavy nuclei. The model was successfully tested in the description of experimental results related to the electron-nucleus elastic and inelastic scattering. In the present work, we consider heavy-ion collisions and assume this model to calculate folding-type coupling potentials for inelastic states, through the corresponding transition densities. As an example, the method is applied to coupled-channel data analyses for the α+ 70,72,74,76 Ge systems.

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Reinterpreting the energy dependence of the optical potential

Cited by 10 publications

References 23 publications

Understanding the mechanisms of nuclear collisions: A complete study of the B10+Sn120 reaction

Understanding the mechanisms of nuclear collisions: A complete study of the B10+Sn120 reaction

Important role of projectile excitation in O16+Ni60 and O<

Folding-type coupling potentials in the context of the generalized rotation–vibration model

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