Quantum coupled-channels model of nuclear fusion with a semiclassical consideration of neutron rearrangement

Карпов, А. В.; Rachkov, V. A.; Самарин, В. В.

doi:10.1103/physrevc.92.064603

Cited by 30 publications

(45 citation statements)

References 52 publications

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“…The ECC model with neutron rearrangement has been successfully used for reproducing and predicting cross sections of various other cases where transfer coupling plays an important role. That model has been recently implemented with a more realistic CC calculation of the fusion probability [97]. This further step (Quantum Coupled Channels + Empirical Neutron Rearrangement model) allowed them to obtain a good overall agreement with the shape of the barrier distribution, as well as with the sub-barrier excitation functions, for several S, Ca + Zr and Ni + Mo systems.…”

Section: B Medium-mass and Medium-light Systemsmentioning

confidence: 99%

Recent experimental results in sub- and near-barrier heavy-ion fusion reactions

Montagnoli

Stefanini

2017

Eur. Phys. J. A

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Recent advances obtained in the field of near and sub-barrier heavy-ion fusion reactions are reviewed. Emphasis is given to the results obtained in the last decade, and focus will be mainly on the experimental work performed concerning the influence of transfer channels on fusion cross sections and the hindrance phenomenon far below the barrier. Indeed, early data of sub-barrier fusion taught us that cross sections may strongly depend on the low-energy collective modes of the colliding nuclei, and, possibly, on couplings to transfer channels. The coupled-channels (CC) model has been quite successful in the interpretation of the experimental evidences. Fusion barrier distributions often yield the fingerprint of the relevant coupled channels. Recent results obtained by using radioactive beams are reported. At deep sub-barrier energies, the slope of the excitation function in a semilogarithmic plot keeps increasing in many cases and standard CC calculations overpredict the cross sections. This was named a hindrance phenomenon, and its physical origin is still a matter of debate. Recent theoretical developments suggest that this effect, at least partially, may be a consequence of the Pauli exclusion principle. The hindrance may have far-reaching consequences in astrophysics where fusion of light systems determines stellar evolution during the carbon and oxygen burning stages, and yields important information for exotic reactions that take place in the inner crust of accreting neutron stars.

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Section: B Medium-mass and Medium-light Systemsmentioning

confidence: 99%

Recent experimental results in sub- and near-barrier heavy-ion fusion reactions

Montagnoli

Stefanini

2017

Eur. Phys. J. A

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“…Other approaches have also been considered to study the impact of neutron transfer on fusion barriers and fusion cross-sections. These include the coupledchannels (CC) approach [23-25] and models incorporating intermediate neutron rearrangements [26][27][28].The predictions of fusion enhancement based on Q-value arguments have been recently challenged by a series of experiments carried out with radioactive 132 Sn beams and with stable 124 Sn beams on 40,48 Ca targets [29]. It turns out that the 40 Ca+Sn systems have many positive Q-values for neutronpickup while all the Q-values for 48 Ca+Sn are negative.…”

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confidence: 99%

Dependence of fusion on isospin dynamics

2017

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We introduce a new microscopic approach to calculate the dependence of fusion barriers and cross-sections on isospin dynamics. The method is based on the time-dependent Hartree-Fock theory and the isoscalar and isovector properties of the energy density functional (EDF). The contribution to the fusion barriers originating from the isoscalar and isovector parts of the EDF is calculated. It is shown that for non-symmetric systems the isovector dynamics influence the sub-barrier fusion cross-sections. For most systems this results in an enhancement of the sub-barrier cross-sections, while for others we observe differing degrees of hindrance. We use this approach to provide an explanation of recently measured fusion cross sections which show a surprising enhancement at low $E_\mathrm{c.m.}$ energies for the system $^{40}$Ca+$^{132}$Sn as compared to the more neutron-rich system $^{48}$Ca+$^{132}$Sn, and discuss the dependence of sub-barrier fusion cross-sections on transfer.Comment: 5 pages, 4 figure

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“…The nuclear fusion associated with different mechanisms that need to a unique nuclear potential to be understood [11]. The probability of tunneling depends on many factors such as the change of the intrinsic synthesis during the reaction and to the influence of the open channels [12,13].The nuclear fusion process provides us with the information that we need to understand the nuclear synthesis and the astrophysical nucleogenesis [14].Recently, F. A. Majeed and Abdul-Hussien [15] had employed the semiclassical approach to study the effect of the breakup channel using CDCC method on the fusion on the fusion reaction cross section , and the fusion barrier distribution for 6,8 H halo nuclei. F.A.M et al [16] had performed had performed semiclassical coupled-channels calculations in heavy-ion fusion reaction for the systems 40 Ar+ 110 Pd and 132 Sn+ 48 Ca, they proved that he semiclassical approach including the coupling between the elastic channel and the continuum proves to be very successful in describing the total fusion reaction cross section and the fusion barrier distribution below and above the Coulomb barrier for medium and heavy systems.…”

Section: Introductionmentioning

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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Quantum coupled-channels model of nuclear fusion with a semiclassical consideration of neutron rearrangement

Cited by 30 publications

References 52 publications

Recent experimental results in sub- and near-barrier heavy-ion fusion reactions

Recent experimental results in sub- and near-barrier heavy-ion fusion reactions

Dependence of fusion on isospin dynamics

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

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