Surface-enhanced pair transfer amplitude in quadrupole states of neutron-rich Sn isotopes

Serizawa, Yasuyoshi

doi:10.1103/physrevc.82.024318

Cited by 43 publications

(73 citation statements)

References 84 publications

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“…Our theoretical tool is the Hartree-Fock-Bogoliubov mean-field model using the Skyrme energy density functional and the continuum quasiparticle random phase approximation, and it is the same as adopted in Ref. [23]. A similar approach is made in Khan et al [21,26], where the L = 0 pairing vibration in neutron-rich Sn isotopes is also studied.…”

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%

“…[21,22] and in Ref. [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.…”

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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“…The effect of correlations between nucleons on the nuclear breakup mechanism has been studied both experimentally and theoretically [39,40]. There exists also several studies demonstrating enhancement of the pair correlation in the nuclear surface and exterior regions of the neutron-rich nuclei [35][36][37][38]. By describing the capture (fusion) reactions at sub-barrier energies within the quantum diffusion approach, we want to demonstrate indirectly the strong surface enhancement of the neutron pairing in the stable and unstable nuclei.…”

Section: Neutron Pair Transfer In Sub-barrier Capture Processmentioning

confidence: 99%

“…There exists several studies demonstrating enhancement of the pair correlation in the nuclear surface and exterior regions of the neutron-rich nuclei [35][36][37][38]. The effect of correlations between nucleons on the nuclear breakup mechanism has been studied both experimentally and theoretically [39,40].…”

Section: Neutron Pair Transfer In Sub-barrier Capture Processmentioning

confidence: 99%

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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“…We consider a spherical cell whose radius is fixed to 20 fm while we performed systematic calculation for various Z = 20 − 50 and neutron density ρ n (via varying λ n ). Under the above setup, we perform the linear response (QRPA) calculation to explore collective excitation of inner crust matter using an extended version of our QRPA code [14][15][16]. In the present study we focus on SPH with the dipole multipolarity since it is responsible to the coupling to the displacement motion of the cluster, which brings about the LPH.…”

Section: Modelmentioning

confidence: 99%

Density Functional Approach to Superfluid Phonon in Inner Crust of Neutron Stars

Inakura

2018

Proceedings of the Workshop on Quarks and Compact Stars 2017 (QCS2017)

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We investigate superfluid phonon emerging in inner crust of neutron stars by means of the nuclear density functional theory. Adopting the Wigner-Seitz approximation and a single spherical cell, we describe low-lying collective excitation with the dipole multipolarity. It is found that the superfluid phonon standing on the low-density neutron superfluid does not penetrate into the interior of the nuclear cluster. This suggests that the coupling between the superfluid phonon and the lattice phonon could be weak, and it may affect the thermal conductivity of inner crust.

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Surface-enhanced pair transfer amplitude in quadrupole states of neutron-rich Sn isotopes

Cited by 43 publications

References 84 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

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

Density Functional Approach to Superfluid Phonon in Inner Crust of Neutron Stars

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