Coupled-channels description of multinucleon transfer and fusion reactions at energies near and far below the Coulomb barrier

Scamps, Guillaume; Hagino, K.

doi:10.1103/physrevc.92.054614

Cited by 20 publications

(5 citation statements)

References 63 publications

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“…In conclusion, it was found that the two-neutron transfer probability is enhanced as compared to a simple expectation of independent particle transfer process, i.e., the square of oneneutron transfer probability. The coupled-channels calculations performed for this system also suggested a significant effect of the couplings to the collective excited states around the Coulomb barrier [75]. The TDHF + BCS formalism was also applied for this type of reactions [76,77].…”

Section: Nucleon-nucleon Correlationsmentioning

confidence: 99%

Multinucleon transfer reactions: a mini-review of recent advances

Mijatović

2022

Front. Phys.

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Multinucleon transfer reactions, characterized by the exchange of many nucleons at energies in the vicinity of the Coulomb barrier, have been extensively used in the last decades to understand the production of neutron-rich nuclei, as well as to study their structure. In this Mini Review, recent results related to the production mechanism of heavy neutron-rich nuclei obtained with stable and radioactive beams will be discussed together with the results concerning the proton transfer channels. Additionally, newest results from a series of experiments carried out to study nucleon-nucleon correlations for closed-shell and superfluid systems employing the large solid angle magnetic spectrometer PRISMA will be summarized.

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Section: Nucleon-nucleon Correlationsmentioning

confidence: 99%

Multinucleon transfer reactions: a mini-review of recent advances

Mijatović

2022

Front. Phys.

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“…The importance of studying the reaction dynamics of colliding nuclei at energies near the Coulomb barrier lead the investigators to the barrier distribution function. For the barrier heights B and the corresponding weights D (B) from fusion cross section can be determined as the sum of the fusion cross section from distributed fusion barriers in form [28,32] ( ) ∫ ( ) ( ) ( )…”

Section: Fusion Barrier Distributionmentioning

confidence: 99%

Study of The Breakup Channel Effect on The Semiclassical and Quantum Mechanical Calculations for The Light and Medium System

Majeed¹,

AlAteah²,

Mhaimeed³

2018

JK-Physics

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A semiclassical and full quantum mechanical approaches have been used to study the effect of channel coupling on the calculations of the total fusion reaction cross section , the fusion barrier distribution and the reaction probability for the systems 11B+237Np, 15N+54Fe and 58Ni +54Fe. The semiclassical approach used in the present work based on the method of the Alder and Winther for Coulomb excitation. The full quantum mechanical approach was based on solving the time dependent Schrödinger equationincluding the coupling effect. A comparison of our semiclassical calculations and full quantum mechanical calculations with the corresponding experimental data shows good agreement, above and below the Coulomb barrier.

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“…While vibrational couplings usually lower the barrier, the effect of transfer channels is less clear despite sev-eral experimental investigations [4, 16-20, 89, 90]. One problem is the difficulty to incorporate transfer channels in coupled-channel calculations [91][92][93][94]. Alternatively, microscopic approaches can also be used to study transfer reaction mechanisms in heavy-ion collisions [95][96][97].…”

Section: Role Of Transfermentioning

confidence: 99%

“…One problem is the difficulty to incorporate transfer channels in coupled-channel calculations [91][92][93][94]. Alternatively, microscopic approaches can also be used to study transfer reaction mechanisms in heavy-ion collisions [95][96][97].…”

Section: Role Of Transfermentioning

confidence: 99%

Dynamical effects in fusion with exotic nuclei

2016

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Background:Reactions with stable beams have demonstrated a strong interplay between nuclear structure and fusion. Exotic beam facilities open new perspectives to understand the impact of neutron skin, large isospin, and weak binding energies on fusion. Microscopic theories of fusion are required to guide future experiments.Purpose: To investigate new effects of exotic structures and dynamics in near-barrier fusion with exotic nuclei.Method: Microscopic approaches based on the Hartree-Fock (HF) mean-field theory are used for studying fusion barriers in 40−54 Ca+ 116 Sn reactions for even isotopes. Bare potential barriers are obtained assuming frozen HF ground-state densities. Dynamical effects on the barrier are accounted for in time-dependent Hartree-Fock (TDHF) calculations of the collisions. Vibrational couplings are studied in the coupled-channel framework and near-barrier nucleon transfer is investigated with TDHF calculations.Results: The development of a neutron skin in exotic calcium isotopes strongly lowers the bare potential barrier. However, this static effect is not apparent when dynamical effects are included. On the contrary, a fusion hindrance is observed in TDHF calculations with the most neutron rich calcium isotopes which cannot be explained by vibrational couplings. Transfer reactions are also important in these systems due to charge equilibration processes.Conclusions: Despite its impact on the bare potential, the neutron skin is not seen as playing an important role in the fusion dynamics. However, the charge transfer with exotic projectiles could lead to an increase of the Coulomb repulsion between the fragments, suppressing fusion. The effect of transfer and dissipative mechanisms on fusion with exotic nuclei deserve further studies.

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Coupled-channels description of multinucleon transfer and fusion reactions at energies near and far below the Coulomb barrier

Cited by 20 publications

References 63 publications

Multinucleon transfer reactions: a mini-review of recent advances

Multinucleon transfer reactions: a mini-review of recent advances

Study of The Breakup Channel Effect on The Semiclassical and Quantum Mechanical Calculations for The Light and Medium System

Dynamical effects in fusion with exotic nuclei

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