Pairing correlations of nucleons and multi-nucleon transfer between heavy nuclei

Oertzen, W. von; Vitturi, A.

doi:10.1088/0034-4885/64/10/202

Cited by 179 publications

(171 citation statements)

References 164 publications

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“…In the past a considerable number of experimental and theoretical studies of two-neutron transfer have been accumulated for stable nuclei [6][7][8][9][10][11][12]. One of the central concepts established there is that the two-neutron transfer amplitude is influenced by collective excitation modes caused by the superfluidity or the pair correlation [7][8][9]12].…”

Section: Introductionmentioning

confidence: 99%

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Anomalous pairing vibration in neutron-rich Sn isotopes beyond theN=82magic number

Shimoyama

2011

Phys. Rev. C

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Two-neutron transfer associated with the pair correlation in superfluid neutron-rich nuclei is studied with focus on low-lying 0 + states in Sn isotopes beyond the N = 82 magic number. We describe microscopically the two-neutron addition and removal transitions by means of the Skyrme-HartreeFock-Bogoliubov mean-field model and the continuum quasiparticle random phase approximation formulated in the coordinate space representation. It is found that the pair transfer strength for the transitions between the ground states becomes significantly large for the isotopes with A ≥ 140, reflecting very small neutron separation energy and long tails of the weakly bound 3p orbits. In 132−140 Sn, a peculiar feature of the pair transfer is seen in transitions to low-lying excited 0 + states. They can be regarded as a novel kind of pair vibrational mode which is characterized by an anomalously long tail of the transition density extending to far outside of the nuclear surface, and a large strength comparable to that of the ground-state transitions. The presence of the weakly bound neutron orbits plays a central role for these anomalous behaviors.

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Section: Introductionmentioning

confidence: 99%

“…[23], respectively. Recent experiments of (p, t) reaction on light-mass neutron-rich nuclei such as 11 Li [2,24,25] and 6,8 He [1, [3][4][5] point to the importance of the pair correlation in these typical halo or skin nuclei. The giant pairing vibration in neutron-rich nuclei has also been discussed [26,27].…”

Section: Introductionmentioning

confidence: 99%

Anomalous pairing vibration in neutron-rich Sn isotopes beyond theN=82magic number

Shimoyama

2011

Phys. Rev. C

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“…In this case, the dominant channel is the transfer of one neutron from 64 Ni to 40 Ca, followed by the twoneutron transfer channel. However, the relative weighting between individual channels could be strongly modified with the inclusion of dynamical pairing [81] favouring pair transfer channels [82,83].…”

Section: Sub-barrier Transfer Probabilitiesmentioning

confidence: 99%

Microscopic study ofCa40+Ni58,64fusion reactions

et al. 2016

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Background: Heavy-ion fusion reactions at energies near the Coulomb barrier are influenced by couplings between the relative motion and nuclear intrinsic degrees of freedom of the colliding nuclei. The time-dependent Hartree-Fock (TDHF) theory, incorporating the couplings at the meanfield level, as well as the coupled-channels (CC) method are standard approaches to describe low energy nuclear reactions. Purpose: To investigate the effect of couplings to inelastic and transfer channels on the fusion cross sections for the reactions 40 Ca+ 58 Ni and 40 Ca+ 64 Ni. Methods: Fusion cross sections around and below the Coulomb barrier have been obtained from coupled-channels (CC) calculations, using the bare nucleus-nucleus potential calculated with the frozen Hartree-Fock method and coupling parameters taken from known nuclear structure data. The fusion thresholds and neutron transfer probabilities have been calculated with the TDHF method.

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“…The study of this process is one of the key point in the understanding of pairing correlations in nuclei. The distinction between two-step sequential and one-step cluster transfer is a great challenge, not only in nuclear physics but also in electron transfer between ions or atomic cluster collisions [12]. Note that the capture (fusion) reaction following the neutron pair transfer is an indirect way of the study on pairing effects, and completely different from the two-neutron or multinucleon transfer reaction.…”

Section: Neutron Pair Transfer In Sub-barrier Capture Processmentioning

confidence: 99%

“…The corresponding pair transfer modes are usually described in terms of pairing vibrations or pairing rotations [10,11], which are one of collective vibrational modes associated with the pair correlation. It has been established that the two-neutron transfer amplitude is a e-mail: sargsyan@theor.jinr.ru influenced by collective modes caused by the Cooper-pair superfluidity [12]. The experimental signatures of a spatial two-neutron correlation or the di-neutron correlation between two weakly bound neutrons forming the halo in 6,8 He and 11 Li have been reported in Refs.…”

Section: Introductionmentioning

confidence: 98%

Role of neutron transfer and deformation effect in capture process at sub-barrier energies

Sargsyan¹,

Adamian²,

Antonenko³

et al. 2012

EPJ Web of Conferences

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Abstract. The roles of nuclear deformation and neutron transfer in sub-barrier capture process are studied within the quantum diffusion approach. The change of the deformations of colliding nuclei with neutron exchange can crucially influence the sub-barrier fusion. The sub-barrier capture reactions following the neutron pair transfer are used for the indirect study of neutron-neutron correlation in the surface region of nucleus. The strong surface enhancement of the neutron pairing in nuclei 48 Ca, 64 Ni, and 116,124,132 Sn is demonstrated. Comparing the capture cross sections calculated without the breakup effect and experimental complete fusion cross sections, the breakup was analyzed in reactions with weakly bound projectiles 6,7,9 Li and 9 Be. A trend of a systematic behavior for the complete fusion suppression as a function of the target charge and bombarding energy is not achieved.

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Pairing correlations of nucleons and multi-nucleon transfer between heavy nuclei

Cited by 179 publications

References 164 publications

Anomalous pairing vibration in neutron-rich Sn isotopes beyond theN=82magic number

Anomalous pairing vibration in neutron-rich Sn isotopes beyond theN=82magic number

Microscopic study ofCa40+Ni58,64fusion reactions

Role of neutron transfer and deformation effect in capture process at sub-barrier energies

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