Odd–even staggering in neutron drip line nuclei

Changizi, Sara A.; Qi, Chong

doi:10.1016/j.nuclphysa.2016.03.056

Cited by 12 publications

(8 citation statements)

References 89 publications

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“…To probe this conjecture one may compare the formation probabilities extracted from the experimental half-lives to the corresponding pairing gaps. The latter can readily be obtained from the experimental binding energies as [165,199,135,200,201,200,202] ∆ n (Z, N)…”

Section: Bcs Treatment Of Alpha Decay and Pairing Correlationmentioning

confidence: 99%

Recent developments in radioactive charged-particle emissions and related phenomena

Liotta

Wyss

2019

Progress in Particle and Nuclear Physics

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The advent and intensive use of new detector technologies as well as radioactive ion beam facilities have opened up possibilities to investigate alpha, proton and cluster decays of highly unstable nuclei. This article provides a review of the current status of our understanding of clustering and the corresponding radioactive particle decay process in atomic nuclei. We put alpha decay in the context of charged-particle emissions which also include one-and two-proton emissions as well as heavy cluster decay. The experimental as well as the theoretical advances achieved recently in these fields are presented. Emphasis is given to the recent discoveries of charged-particle decays from proton-rich nuclei around the proton drip line. Those decay measurements have shown to provide an important probe for studying the structure of the nuclei involved. Developments on the theoretical side in nuclear many-body theories and supercomputing facilities have also made substantial progress, enabling one to study the nuclear clusterization and decays within a microscopic and consistent framework. We report on properties induced by the nuclear interaction acting in the nuclear medium, like the pairing interaction, which have been uncovered by studying the microscopic structure of clusters. The competition between cluster formations as compared to the corresponding alpha-particle formation are included. In the review we also describe the search for super-heavy nuclei connected by chains of alpha and other radioactive particle decays.

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Section: Bcs Treatment Of Alpha Decay and Pairing Correlationmentioning

confidence: 99%

Recent developments in radioactive charged-particle emissions and related phenomena

Liotta

Wyss

2019

Progress in Particle and Nuclear Physics

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“…According to the conclusions of Refs. [46][47][48] and the present study, one can see that the choice of the pairing forces is important for the study of nuclear structure within the SHFB approach. In fact, in the particle-particle channel the volume and surface pairings are two kinds of extreme cases.…”

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confidence: 58%

“…Thus the bubble with the surface pairing is the weakest. The experimental energy difference between the 2𝑠 1/2 and 1𝑑 3/2 states for 48 Ca is just 0.40 MeV. [6] Thus the two states are quasi-degenerate.…”

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confidence: 94%

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Pairing Effects on Bubble Nuclei

Wang¹,

Li²,

Qi³

et al. 2019

Chinese Phys. Lett.

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In the framework of the Skyrme-Hartree-Fock-Bogoliubov approach with the SkT interaction, the pairing effects on the proton bubble structures of 46 Ar and 206 Hg are discussed. In calculations, three kinds of pairing forces (volume, surface and mixed pairing interactions) are used. For 46 Ar, it is shown that the bubble structure with the volume pairing is almost the same as that with the mixed pairing. The bubble with the surface pairing is less pronounced than those with the volume and mixed pairings. Analyzing the density distributions and occupation probabilities of the proton 𝑠 states and the quasi-degeneracy between the proton 2𝑠 1/2 and 1𝑑 3/2 orbitals, we explain the difference between the bubble structure with the surface pairing and those with the volume and mixed pairings. For 206 Hg, it is seen that the proton density distribution with the surface pairing is different from those with the volume and mixed pairings in the whole region of the radial distance. In addition, it is found that the bubbles with the three pairing forces are different from each other and the least pronounced bubble is obtained with the surface pairing. Thus the selection of the pairing force is important for the study of the nuclear bubble structure.

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“…Finally, it is necessary to point out that only mixed pairing was used in this work. Relevant studies suggest that the properties of neutron-rich nuclei are strongly dependent on the pairing form [93,94]. It would be interesting to predict the structure of neutron-rich Ca isotopes with surface and volume pairings in the framework of the SHFB approach with tensor force, which is a work in progress.…”

Section: S 2nmentioning

confidence: 99%

Tensor force effect on the exotic structure of neutron-rich Ca isotopes *

Wang¹,

Su²,

Qi³

et al. 2019

Chinese Phys. C

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The structure of neutron-rich Ca isotopes is studied in the spherical Skyrme-Hartree-Fock-Bogoliubov (SHFB) approach with SLy5, SLy5+T, and 36 sets of TIJ parametrizations. The calculated results are compared with the available experimental data for the average binding energies, two-neutron separation energies and charge radii. It is found that the SLy5+T, T31, and T32 parametrizations reproduce best the experimental properties, especially the neutron shell effects at N = 20, 28 and 32, and the recently measured two-neutron separation energy of 56Ca. The calculations with the SLy5+T and T31 parametrizations are extended to isotopes near the neutron drip line. The neutron giant halo structure in the very neutron-rich Ca isotopes is not seen with these two interactions. However, depleted neutron central densities are found in these nuclei. By analyzing the neutron mean-potential, the reason for the bubble-like structure formation is given.

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Odd–even staggering in neutron drip line nuclei

Cited by 12 publications

References 89 publications

Recent developments in radioactive charged-particle emissions and related phenomena

Recent developments in radioactive charged-particle emissions and related phenomena

Pairing Effects on Bubble Nuclei

Tensor force effect on the exotic structure of neutron-rich Ca isotopes *

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